Cisco IOS XR and Cisco NX-OS Software IPv6 Access Control List Bypass Vulnerability
A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software and Cisco NX-OS Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass an IPv6 access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to improper processing of IPv6 traffic that is sent through an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 packets that traverse the affected device. A successful exploit could allow the attacker to access resources that would typically be protected by the interface ACL. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-acl-CHgdYk8j ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-acl-CHgdYk8j"]
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2021-1389US | medium6.5 | — | ||
A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software and Cisco NX-OS Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass… | ||||
references
External citations — patches, advisories, analysis.
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-acl-CHgdYk8jexternal
- Security Vulnerability Policyexternal
- considering software upgradesexternal
- Cisco Software Checkerexternal
- Cisco Nexus 3600 NX-OS Security Configuration Guideexternal
- Cisco Nexus 3600 NX-OS Unicast Routing Configuration Guideexternal
- Cisco Nexus 9000 Series NX-OS Security Configuration Guideexternal
- Cisco Nexus 9000 Series NX-OS Unicast Routing Configuration Guideexternal
remediations (50)
- Fixed10.2(3v)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(3o)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(3p)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(3q)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(3r)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(3w)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(3x)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(4g)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(4h)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(99w)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - Fixed10.3(99x)
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco IOS XR Software
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3a) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3a) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3c) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(3c) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(4) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(5) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 7.0(3)F3(5) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(2t) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(2v) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.2(4) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(1) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(1) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(1z) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(2) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(2) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(3) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(3) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(4) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(4) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(5) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(5) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(5w) when installed on Cisco Nexus 3000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco NX-OS Software 9.3(5w) when installed on Cisco Nexus 9000 Series Switches
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
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