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Cisco IOS XR and Cisco NX-OS Software IPv6 Access Control List Bypass Vulnerability

cisco-sa-ipv6-acl-CHgdYk8j · Medium · Published · Updated

A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software and Cisco NX-OS Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass an IPv6 access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to improper processing of IPv6 traffic that is sent through an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 packets that traverse the affected device. A successful exploit could allow the attacker to access resources that would typically be protected by the interface ACL. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-acl-CHgdYk8j

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2021-1389
Cisco Bug IDsCSCvm55638, CSCvv45698
CVSS ScoreBase 5.8
Base 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
Product Names From Source
Cisco IOS XR Software, Cisco NX-OS Software 7.0(3)F3(1), Cisco NX-OS Software 7.0(3)F3(2), Cisco NX-OS Software 7.0(3)F3(3), Cisco NX-OS Software 7.0(3)F3(3a), Cisco NX-OS Software 7.0(3)F3(4), Cisco NX-OS Software 7.0(3)F3(3c), Cisco NX-OS Software 7.0(3)F3(5), Cisco NX-OS Software 9.2(1), Cisco NX-OS Software 9.2(2), Cisco NX-OS Software 9.2(2t), Cisco NX-OS Software 9.2(3), Cisco NX-OS Software 9.2(3y), Cisco NX-OS Software 9.2(4), Cisco NX-OS Software 9.2(2v), Cisco NX-OS Software 9.3(1), Cisco NX-OS Software 9.3(2), Cisco NX-OS Software 9.3(3), Cisco NX-OS Software 9.3(1z), Cisco NX-OS Software 9.3(4), Cisco NX-OS Software 9.3(5), Cisco NX-OS Software 9.3(5w), Cisco NX-OS Software 10.2(3v), Cisco NX-OS Software 10.3(99w), Cisco NX-OS Software 10.3(3w), Cisco NX-OS Software 10.3(99x), Cisco NX-OS Software 10.3(3o), Cisco NX-OS Software 10.3(3p), Cisco NX-OS Software 10.3(3q), Cisco NX-OS Software 10.3(3x), Cisco NX-OS Software 10.3(4g), Cisco NX-OS Software 10.3(3r), Cisco NX-OS Software 10.3(4h), Cisco NX-OS Software, Cisco Nexus 3000 Series Switches, Cisco Nexus 9000 Series Switches

Related Products

Product CVE Evidence
Cisco Nexus Dashboard CVE-2021-1389 Cisco OpenVuln
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Cisco Nexus 3000 Series Switch CVE-2021-1389 Cisco OpenVuln
Cisco NX-OS Software CVE-2021-1389 Cisco OpenVuln
Cisco IOS XR Software CVE-2021-1389 Cisco OpenVuln
Cisco IOS CVE-2021-1389 Cisco OpenVuln