CVE-2020-3119 Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution Vulnerability
An adjacent attacker can execute arbitrary code with administrative privileges on Cisco NX-OS devices by sending a malicious CDP packet.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3119?
CVE-2020-3119 is a high-severity memory corruption vulnerability in Cisco Nx-Os, published on 5 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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. 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).
Weakness: CWE-787
Which versions are affected by CVE-2020-3119?
It affects 2 products.
Products include Cisco Nx-Os, Cisco Ucs Manager.
How do I fix CVE-2020-3119?
No fix has been published for CVE-2020-3119 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-3119 being exploited?
There is no known exploitation of CVE-2020-3119 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-wq2m-fgj4-27jc.