Input validation error in Cisco IOS XR - CVE-2021-1268
Published: February 4, 2021 / Updated: February 5, 2021
Vulnerability identifier: #VU50374
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1268
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. A remote attacker on the same local network can cause an IPv6 flood and perform a denial of service (DoS) attack.
Affected software
Cisco IOS XR
How to mitigate CVE-2021-1268
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 6.5.2 .SMU, 6.7.3, 7.1.3, 7.2.2