cisco-sa-nxos-ospfv3-dos-48qutcu: Cisco NX-OS Software OSPFv3 Denial of Service Vulnerability
First published: Wed Aug 24 2022(Updated: )
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. 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-nxos-ospfv3-dos-48qutcu This advisory is part of the August 2022 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: August 2022 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication.
Credit: This vulnerability was found by Sivasankar Sundararaj Cisco during internal security testing
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS Software | =8.2(8)<Nexus 7000 Series Switches | Nexus 7000 Series Switches |
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Reference Links
Frequently Asked Questions
What is the Cisco NX-OS Software OSPFv3 Denial of Service vulnerability?
It is a vulnerability that allows an unauthenticated, remote attacker to cause a denial of service condition on an affected device.
What is the severity of the Cisco NX-OS Software OSPFv3 Denial of Service vulnerability?
The severity is high with a CVSS score of 8.6.
Which devices are affected by the Cisco NX-OS Software OSPFv3 Denial of Service vulnerability?
Nexus 7000 Series Switches running Cisco NX-OS Software 8.2(8) and up to exclusive Nexus 7000 Series Switches are affected.
How can an attacker exploit the Cisco NX-OS Software OSPFv3 Denial of Service vulnerability?
The attacker can exploit the vulnerability by sending malicious OSPFv3 packets with incomplete input validation.
Is there a remedy for the Cisco NX-OS Software OSPFv3 Denial of Service vulnerability?
Yes, applying the recommended patch or upgrading to a fixed version of Cisco NX-OS Software can mitigate the vulnerability.
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