high
7.4
CWE
684
Advisory Published
Updated

CVE-2024-20317: Cisco IOS XR Software Layer 2 Services Denial of Service Vulnerability

First published: Wed Sep 11 2024(Updated: )

A vulnerability in the handling of specific Ethernet frames by Cisco IOS XR Software for various Cisco Network Convergence System (NCS) platforms could allow an unauthenticated, adjacent attacker to cause critical priority packets to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect classification of certain types of Ethernet frames that are received on an interface. An attacker could exploit this vulnerability by sending specific types of Ethernet frames to or through the affected device. A successful exploit could allow the attacker to cause control plane protocol relationships to fail, resulting in a DoS condition. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS XRv 9000=7.7.1
Cisco IOS XRv 9000=7.7.2
Cisco IOS XRv 9000=7.7.21
Cisco IOS XRv 9000=7.8.1
Cisco IOS XRv 9000=7.8.2
Cisco IOS XRv 9000=7.8.22
Cisco IOS XRv 9000=7.9.1
Cisco IOS XRv 9000=7.9.2
Cisco IOS XRv 9000=7.9.21
Cisco IOS XRv 9000=7.10.1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-20317?

    CVE-2024-20317 is classified as a critical vulnerability due to its potential to cause denial of service.

  • How do I fix CVE-2024-20317?

    To mitigate CVE-2024-20317, update affected Cisco IOS XR Software to a patched version as recommended by Cisco.

  • Which versions of Cisco IOS XR Software are affected by CVE-2024-20317?

    CVE-2024-20317 affects Cisco IOS XR Software versions 7.7.1, 7.7.2, 7.7.21, 7.8.1, 7.8.2, 7.8.22, 7.9.1, 7.9.2, 7.9.21, and 7.10.1.

  • Who can exploit CVE-2024-20317?

    CVE-2024-20317 can be exploited by an unauthenticated, adjacent attacker.

  • What impact does CVE-2024-20317 have on Cisco systems?

    CVE-2024-20317 may lead to critical priority packets being dropped, resulting in a denial of service on affected systems.

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