cisco-sa-nxos-cdp-dos-ce-wWvPucC9: Cisco FXOS and NX-OS Software Cisco Discovery Protocol Denial of Service and Arbitrary Code Execution Vulnerability
First published: Wed Aug 24 2022(Updated: )
A vulnerability in the Cisco Discovery Protocol feature of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation of specific values that are within a Cisco Discovery Protocol message. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges or cause the Cisco Discovery Protocol process to crash and restart multiple times, which would cause the affected device to reload, resulting in a DoS condition. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). 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-cdp-dos-ce-wWvPucC9 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: an anonymous researcher the National Cyber Security Centre of the Netherlands
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS Software | =9.3(9)<Nexus 3000 and 9000 Series Switches=8.2(8)<Nexus 7000 Series Switches | Nexus 3000 and 9000 Series Switches Nexus 7000 Series Switches |
| Cisco UCS Software | =4.2<4.2(1n)>=Earlier than 4.1<=4.1<4.1(3i) | 4.2(1n) 4.1(3i) |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-nxos-cdp-dos-ce-wWvPucC9?
The severity of cisco-sa-nxos-cdp-dos-ce-wWvPucC9 is high, with a severity value of 8.8.
How does cisco-sa-nxos-cdp-dos-ce-wWvPucC9 affect Cisco FXOS Software and Cisco NX-OS Software?
cisco-sa-nxos-cdp-dos-ce-wWvPucC9 could allow an unauthenticated, adjacent attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on affected devices.
Which products and versions are affected by cisco-sa-nxos-cdp-dos-ce-wWvPucC9?
cisco-sa-nxos-cdp-dos-ce-wWvPucC9 affects Cisco NX-OS Software versions 9.3(9), 8.2(8), Nexus 3000 and 9000 Series Switches, and Nexus 7000 Series Switches.
How can I fix cisco-sa-nxos-cdp-dos-ce-wWvPucC9 on my Cisco devices?
To fix cisco-sa-nxos-cdp-dos-ce-wWvPucC9, it is recommended to update to the latest available software version provided by Cisco.
Where can I find more information about cisco-sa-nxos-cdp-dos-ce-wWvPucC9?
More information about cisco-sa-nxos-cdp-dos-ce-wWvPucC9 can be found on the Cisco Security Advisory page: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cdp-dos-ce-wWvPucC9
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- vendor/cisco
- canonical/cisco nx-os software
- version/cisco nx-os software/9.3(9)
- version/cisco nx-os software/8.2(8)
- canonical/cisco ucs software
- version/cisco ucs software/4.2
- version/cisco ucs software/earlier than 4.1
- version/cisco ucs software/4.1