Cisco IOS XR Software Protocol Independent Multicast Denial of Service Vulnerability
A vulnerability in the Protocol Independent Multicast (PIM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the PIM process to restart, resulting in a denial of service condition on an affected device. The vulnerability is due to the incorrect processing of crafted AutoRP packets. An attacker could exploit this vulnerability by sending crafted packets to port UDP 496 on a reachable IP address on the device. A successful exploit could allow the attacker to cause the PIM process to restart. There are workarounds that address this vulnerability.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2019-1712US | high7.5 | — | ||
A vulnerability in the Protocol Independent Multicast (PIM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the PIM process to restart, re… | ||||
references
External citations — patches, advisories, analysis.
remediations (2)
- FixedCisco IOS XR Software
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - WorkaroundCisco IOS XR Software
In environments that do not require PIM rendezvous point mappings learned through Auto-RP, administrators can disable the feature with the auto-rp listen disable configuration command as shown in the following example: router pim address-family ipv4 auto-rp listen disable After the configuration has been committed, a restart of the PIM process is required to disable the listening on UDP port 496. The PIM process can be restarted via the process restart pim location all CLI command.
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