CVE-2019-1712: Cisco IOS XR Software Protocol Independent Multicast Denial of Service Vulnerability

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-04-17 · updated 2026-06-17
Weakness: CWE-20

Description

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. Software versions prior to 6.2.3, 6.3.2, 6.4.0, and 6.5.1 are affected.

Affected products

Cisco IOS XR Software: before 6.2.3; from 6.2.25 before 6.3.2; from 6.3.3 before 6.4.0; from 6.4.1 before 6.5.1 — fixed in 6.2.3, 6.3.2, 6.4.0, 6.5.1

How to fix

Upgrade to a fixed version: Cisco IOS XR Software 6.2.3, 6.3.2, 6.4.0, 6.5.1. Check the vendor advisory for mitigations.

References

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