Cisco NX-OS OSPFv3 buffer over-read

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco NX-OS. Affected by this issue is some unknown functionality of the component OSPFv3. Performing a manipulation results in buffer over-read. This vulnerability is known as CVE-2022-20823. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco NX-OS (Router Operating System) (affected version unknown). It has been classified as critical. This affects an unknown functionality of the component OSPFv3. The manipulation with an unknown input leads to a buffer over-read vulnerability. CWE is classifying the issue as CWE-126. The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the OSPF version 3 (OSPFv3) feature 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 is due to incomplete input validation of specific OSPFv3 packets. An attacker could exploit this vulnerability by sending a malicious OSPFv3 link-state advertisement (LSA) to an affected device. A successful exploit could allow the attacker to cause the OSPFv3 process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition. Note: The OSPFv3 feature is disabled by default. To exploit this vulnerability, an attacker must be able to establish a full OSPFv3 neighbor state with an affected device. For more information about exploitation conditions, see the Details section of this advisory.

The weakness was published 08/25/2022 as cisco-sa-nxos-ospfv3-dos-48qutcu. The advisory is shared at tools.cisco.com. This vulnerability is uniquely identified as CVE-2022-20823 since 11/02/2021. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

License

• commercial

Website

• Vendor: https://www.cisco.com/

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CPE 2.2info

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