PT-2022-4455 · Cisco · Cisco Nx-Os+1

Sivasankar Sundararaj · Published 2022-08-24 · Updated 2022-09-01 · CVE-2022-20823

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco NX-OS Software (affected versions not specified)

Description The issue is related to the OSPF version 3 (OSPFv3) feature of Cisco NX-OS Software and is due to incomplete input validation of specific OSPFv3 packets. This could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. An attacker could exploit this vulnerability by sending a malicious OSPFv3 link-state advertisement (LSA) to an affected device, potentially causing the OSPFv3 process to crash and restart multiple times, resulting in a DoS condition. Note that the OSPFv3 feature is disabled by default, and to exploit this vulnerability, an attacker must be able to establish a full OSPFv3 neighbor state with an affected device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Buffer Over-read

Out of bounds Read

Weakness Enumeration

CWE-126

CWE-125

Related Identifiers

BDU:2022-05320

CVE-2022-20823

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 6

• https://bdu.fstec.ru/vul/2022-05320 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-20823 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ospfv3-dos-48qutcu · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ospfv3-dos-48qutcu · Vendor Advisory
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ospfv3-dos-48qutcu · Note
• https://t.me/true_secator/3342 · Telegram Post