Cisco Adaptive Security Appliance Software SSH Server Resource Denial of Service Vulnerability
A vulnerability in the SSH server of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition for the SSH server of an affected device. This vulnerability is due to a logic error when an SSH session is established. An attacker could exploit this vulnerability by sending crafted SSH messages to an affected device. A successful exploit could allow the attacker to exhaust available SSH resources on the affected device so that new SSH connections to the device are denied, resulting in a DoS condition. Existing SSH connections to the device would continue to function normally. The device must be rebooted manually to recover. However, user traffic would not be impacted and could be managed using a remote application such as Cisco Adaptive Security Device Manager (ASDM). Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is part of the October 2024 release of the Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2024 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300"].
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2024-20526US | medium5.3 | — | ||
A vulnerability in the SSH server of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition f… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- Security Vulnerability Policyexternal
- Cisco Adaptive Security Appliance Software SSH Server Resource Denial of Service Vulnerabilityself
- Cisco Security Vulnerability Policyexternal
- Security Impact Rating (SIR)external
- considering software upgradesexternal
- Cisco Software Checkerexternal
- Cisco Event Response: October 2024 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publicationexternal
- ssh stack ciscosshexternal
Behebungen (46)
- BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco ASA 5500-X Series Firewalls
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 1000 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 2100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 4100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 9000 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.70 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 1000 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 2100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 4100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 9000 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Secure Firewall 3100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 1000 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 2100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 4100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 9000 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Secure Firewall 3100 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - BehobenCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Secure Firewall 4200 Series
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco ASA 5500-X Series Firewalls
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 1000 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 2100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 4100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.67 when installed on Cisco Firepower 9000 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16.4.70 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 1000 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 2100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 4100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Firepower 9000 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.4.40 when installed on Cisco Secure Firewall 3100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 1000 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 2100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 4100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Firepower 9000 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Secure Firewall 3100 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
- WorkaroundCisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20.3 when installed on Cisco Secure Firewall 4200 Series
There is no workaround for this vulnerability for devices that are running Cisco ASA Software Release 9.16.4.67 or 9.16.4.70. For devices that are running Cisco ASA Software Release 9.18.4.40 or 9.20.3, use the ssh stack ciscossh CLI command to configure the device to use the CiscoSSH stack, which is not affected by this vulnerability. For more information about implementing this command, see the ssh stack ciscossh ["https://www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/S/asa-command-ref-S/so-st-commands.html#wp8411317820"] section of Cisco Secure Firewall ASA Series Command Reference. While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
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