high
8.6
CWE
400 770
Advisory Published
Updated

CVE-2024-20321

First published: Wed Feb 28 2024(Updated: )

A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco NX-OS=7.0\(3\)f1\(1\)
Cisco NX-OS=7.0\(3\)f2\(1\)
Cisco NX-OS=7.0\(3\)f2\(2\)
Cisco NX-OS=7.0\(3\)f3\(1\)
Cisco NX-OS=7.0\(3\)f3\(2\)
Cisco NX-OS=7.0\(3\)f3\(3\)
Cisco NX-OS=7.0\(3\)f3\(3a\)
Cisco NX-OS=7.0\(3\)f3\(3c\)
Cisco NX-OS=7.0\(3\)f3\(4\)
Cisco NX-OS=7.0\(3\)f3\(5\)
Cisco NX-OS=9.2\(1\)
Cisco NX-OS=9.2\(2\)
Cisco NX-OS=9.2\(2t\)
Cisco NX-OS=9.2\(2v\)
Cisco NX-OS=9.2\(3\)
Cisco NX-OS=9.2\(4\)
Cisco NX-OS=9.3\(1\)
Cisco NX-OS=9.3\(2\)
Cisco NX-OS=9.3\(3\)
Cisco NX-OS=9.3\(4\)
Cisco NX-OS=9.3\(5\)
Cisco NX-OS=9.3\(6\)
Cisco NX-OS=9.3\(7\)
Cisco NX-OS=9.3\(7a\)
Cisco NX-OS=9.3\(8\)
Cisco NX-OS=9.3\(9\)
Cisco NX-OS=9.3\(10\)
Cisco NX-OS=9.3\(11\)
Cisco NX-OS=9.3\(12\)
Cisco NX-OS=10.1\(1\)
Cisco NX-OS=10.1\(2\)
Cisco NX-OS=10.1\(2t\)
Cisco NX-OS=10.2\(1\)
Cisco NX-OS=10.2\(1q\)
Cisco NX-OS=10.2\(2\)
Cisco NX-OS=10.2\(3\)
Cisco NX-OS=10.2\(3t\)
Cisco NX-OS=10.2\(3v\)
Cisco NX-OS=10.2\(4\)
Cisco NX-OS=10.2\(5\)
Cisco NX-OS=10.2\(6\)
Cisco NX-OS=10.3\(1\)
Cisco NX-OS=10.3\(2\)
Cisco NX-OS=10.3\(3\)
Cisco NX-OS=10.3\(4a\)
Cisco NX-OS=10.3\(99w\)
Cisco NX-OS=10.3\(99x\)
Cisco NX-OS=10.4\(1\)

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-20321?

    CVE-2024-20321 is classified as a high severity vulnerability that can lead to denial of service conditions on affected devices.

  • How do I fix CVE-2024-20321?

    To remediate CVE-2024-20321, you should update your Cisco NX-OS software to the latest available version that addresses this vulnerability.

  • Which versions of Cisco NX-OS are affected by CVE-2024-20321?

    Cisco NX-OS versions 7.0(3)f1(1), 7.0(3)f2(1), 7.0(3)f2(2), 7.0(3)f3(1), and various versions up to 10.4(1) are impacted by CVE-2024-20321.

  • What type of attack can exploit CVE-2024-20321?

    CVE-2024-20321 can be exploited by an unauthenticated remote attacker to cause a denial of service on the device.

  • Is CVE-2024-20321 hard to exploit?

    CVE-2024-20321 is considered relatively easy to exploit due to the unauthentication requirement and the nature of eBGP traffic.

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