description: A vulnerability in the Multicast Leaf Recycle Elimination (mLRE) feature of Cisco IOS XE Software for Cisco ASR 1000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.
This vulnerability is due to incorrect handling of certain IPv6 multicast packets when they are fanned out more than seven times on an affected device. An attacker could exploit this vulnerability by sending a specific IPv6 multicast or IPv6 multicast VPN (MVPNv6) packet through the affected device. A successful exploit could allow the attacker to cause a reload of the affected device, resulting in a DoS condition.
problem types: Use of Out-of-range Pointer Offset
affected:
{
vendor: Cisco
product: Cisco IOS XE Software
versions:
version: 3.7.1S, status: affected
version: 3.7.2S, status: affected
version: 3.7.3S, status: affected
version: 3.7.4S, status: affected
version: 3.7.5S, status: affected
version: 3.7.6S, status: affected
version: 3.7.7S, status: affected
version: 3.7.2tS, status: affected
version: 3.8.0S, status: affected
version: 3.8.1S, status: affected
version: 3.8.2S, status: affected
version: 3.9.1S, status: affected
version: 3.9.0S, status: affected
version: 3.9.2S, status: affected
version: 3.10.0S, status: affected
version: 3.10.1S, status: affected
version: 3.10.2S, status: affected
version: 3.10.3S, status: affected
version: 3.10.4S, status: affected
version: 3.10.5S, status: affected
version: 3.10.6S, status: affected
version: 3.10.7S, status: affected
version: 3.10.1xbS, status: affected
version: 3.10.8S, status: affected
version: 3.10.8aS, status: affected
version: 3.10.9S, status: affected
version: 3.10.10S, status: affected
version: 3.11.1S, status: affected
version: 3.11.2S, status: affected
version: 3.11.0S, status: affected
version: 3.11.3S, status: affected
version: 3.11.4S, status: affected
version: 3.12.0S, status: affected
version: 3.12.1S, status: affected
version: 3.12.2S, status: affected
version: 3.12.3S, status: affected
version: 3.12.4S, status: affected
version: 3.13.0S, status: affected
version: 3.13.1S, status: affected
version: 3.13.2S, status: affected
version: 3.13.3S, status: affected
version: 3.13.4S, status: affected
version: 3.13.5S, status: affected
version: 3.13.2aS, status: affected
version: 3.13.5aS, status: affected
version: 3.13.6S, status: affected
version: 3.13.7S, status: affected
version: 3.13.6aS, status: affected
version: 3.13.8S, status: affected
version: 3.13.9S, status: affected
version: 3.13.10S, status: affected
version: 3.14.0S, status: affected
version: 3.14.1S, status: affected
version: 3.14.2S, status: affected
version: 3.14.3S, status: affected
version: 3.14.4S, status: affected
version: 3.15.0S, status: affected
version: 3.15.1S, status: affected
version: 3.15.2S, status: affected
version: 3.15.3S, status: affected
version: 3.15.4S, status: affected
version: 3.16.0S, status: affected
version: 3.16.1aS, status: affected
version: 3.16.2S, status: affected
version: 3.16.3S, status: affected
version: 3.16.2bS, status: affected
version: 3.16.4aS, status: affected
version: 3.16.4bS, status: affected
version: 3.16.5S, status: affected
version: 3.16.6S, status: affected
version: 3.16.7S, status: affected
version: 3.16.6bS, status: affected
version: 3.16.7aS, status: affected
version: 3.16.7bS, status: affected
version: 3.16.8S, status: affected
version: 3.16.9S, status: affected
version: 3.16.10S, status: affected
version: 3.17.0S, status: affected
version: 3.17.1S, status: affected
version: 3.17.2S, status: affected
version: 3.17.1aS, status: affected
version: 3.17.3S, status: affected
version: 3.17.4S, status: affected
version: 16.2.1, status: affected
version: 16.2.2, status: affected
version: 16.3.1, status: affected
version: 16.3.2, status: affected
version: 16.3.3, status: affected
version: 16.3.1a, status: affected
version: 16.3.4, status: affected
version: 16.3.5, status: affected
version: 16.3.6, status: affected
version: 16.3.7, status: affected
version: 16.3.8, status: affected
version: 16.3.9, status: affected
version: 16.3.10, status: affected
version: 16.3.11, status: affected
version: 16.4.1, status: affected
version: 16.4.2, status: affected
version: 16.4.3, status: affected
version: 16.5.1, status: affected
version: 16.5.1b, status: affected
version: 16.5.2, status: affected
version: 16.5.3, status: affected
version: 16.6.1, status: affected
version: 16.6.2, status: affected
version: 16.6.3, status: affected
version: 16.6.4, status: affected
version: 16.6.5, status: affected
version: 16.6.6, status: affected
version: 16.6.7, status: affected
version: 16.6.8, status: affected
version: 16.6.9, status: affected
version: 16.6.10, status: affected
version: 16.7.1, status: affected
version: 16.7.2, status: affected
version: 16.7.3, status: affected
version: 16.8.1, status: affected
version: 16.8.1s, status: affected
version: 16.8.2, status: affected
version: 16.8.3, status: affected
version: 16.9.1, status: affected
version: 16.9.2, status: affected
version: 16.9.1s, status: affected
version: 16.9.3, status: affected
version: 16.9.4, status: affected
version: 16.9.5, status: affected
version: 16.9.6, status: affected
version: 16.9.7, status: affected
version: 16.9.8, status: affected
version: 16.10.1, status: affected
version: 16.10.1a, status: affected
version: 16.10.1s, status: affected
version: 16.10.1e, status: affected
version: 16.10.2, status: affected
version: 16.10.3, status: affected
version: 16.11.1, status: affected
version: 16.11.1a, status: affected
version: 16.11.2, status: affected
version: 16.11.1s, status: affected
version: 16.12.1, status: affected
version: 16.12.1s, status: affected
version: 16.12.1a, status: affected
version: 16.12.1c, status: affected
version: 16.12.2, status: affected
version: 16.12.3, status: affected
version: 16.12.8, status: affected
version: 16.12.2s, status: affected
version: 16.12.4, status: affected
version: 16.12.3s, status: affected
version: 16.12.5, status: affected
version: 16.12.6, status: affected
version: 16.12.7, status: affected
version: 16.12.10a, status: affected
version: 17.1.1, status: affected
version: 17.1.1s, status: affected
version: 17.1.1t, status: affected
version: 17.1.3, status: affected
version: 17.2.1, status: affected
version: 17.2.1r, status: affected
version: 17.2.1v, status: affected
version: 17.2.2, status: affected
version: 17.2.3, status: affected
version: 17.3.1, status: affected
version: 17.3.2, status: affected
version: 17.3.3, status: affected
version: 17.3.1a, status: affected
version: 17.3.4, status: affected
version: 17.3.5, status: affected
version: 17.3.4a, status: affected
version: 17.3.6, status: affected
version: 17.3.7, status: affected
version: 17.4.1, status: affected
version: 17.4.2, status: affected
version: 17.4.1a, status: affected
version: 17.4.1b, status: affected
version: 17.5.1, status: affected
version: 17.5.1a, status: affected
version: 17.5.1b, status: affected
version: 17.5.1c, status: affected
version: 17.6.1, status: affected
version: 17.6.2, status: affected
version: 17.6.1a, status: affected
version: 17.6.3, status: affected
version: 17.6.3a, status: affected
version: 17.6.4, status: affected
version: 17.6.5, status: affected
version: 17.6.5a, status: affected
version: 17.7.1, status: affected
version: 17.7.1a, status: affected
version: 17.7.2, status: affected
version: 17.10.1, status: affected
version: 17.10.1a, status: affected
version: 17.8.1, status: affected
version: 17.8.1a, status: affected
version: 17.9.1, status: affected
version: 17.9.2, status: affected
version: 17.9.1a, status: affected
version: 17.9.3, status: affected
version: 17.9.2a, status: affected
version: 17.9.3a, status: affected
version: 17.11.1, status: affected
version: 17.11.1a, status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
baseScore: 8.6
baseSeverity: HIGH
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
]
exploits: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.