Input validation error in Cisco IOS XR - CVE-2021-1268

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Main Vulnerability Database Vulnerabilities #VU50374

Input validation error in Cisco IOS XR - CVE-2021-1268

Published: February 4, 2021 / Updated: February 5, 2021


Vulnerability identifier: #VU50374
CSH Severity: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-1268
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS XR
Software vendor:
Cisco Systems, Inc

Description

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.


Remediation

Install updates from vendor's website.

External links