cisco-sa-20200205-nxos-cdp-rce: Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution Vulnerability
First published: Wed Feb 05 2020(Updated: )
A vulnerability in the Cisco Discovery Protocol implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability exists because the Cisco Discovery Protocol parser does not properly validate input for certain fields in a Cisco Discovery Protocol message. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. An successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. 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-20200205-nxos-cdp-rce
Credit: Barak Hadad Armis
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco NX-OS Software | =7.0(3)I7<7.0(3)I7(8) (Feb 2020) or appropriate SMU1 | 7.0(3)I7(8) (Feb 2020) or appropriate SMU1 |
| Cisco NX-OS Software | =14.2<14.2(1j)=14.1<14.2(1j)=14.0<14.2(1j) | 14.2(1j) 14.2(1j) 14.2(1j) |
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Reference Links
Frequently Asked Questions
What is the CVE ID of this vulnerability?
This vulnerability is identified by the CVE ID cve-2020-3119.
What is the severity rating of this vulnerability?
The severity rating of this vulnerability is high with a CVSS score of 8.8.
Which Cisco products are affected by this vulnerability?
This vulnerability affects Cisco NX-OS Software versions 7.0(3)I7(8) (Feb 2020) or appropriate SMU1 and 14.2(1j).
How can an attacker exploit this vulnerability?
An unauthenticated, adjacent attacker can exploit this vulnerability by sending malicious Cisco Discovery Protocol packets to an affected device.
Is there a fix for this vulnerability?
Yes, Cisco has released software updates to address this vulnerability. Please refer to the Cisco Security Advisory for the appropriate remediation steps.
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- agent/last-modified-date
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- source/Cisco
- agent/software-canonical-lookup
- agent/references
- agent/severity
- agent/weakness
- agent/description
- agent/tags
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- vendor/cisco
- canonical/cisco nx-os software
- version/cisco nx-os software/7.0(3)i7
- version/cisco nx-os software/14.2
- version/cisco nx-os software/14.1
- version/cisco nx-os software/14.0