CVE-2022-20824 Cisco FXOS and NX-OS Software Cisco Discovery Protocol Denial of Service and Arbitrary Code Execution Vulnerability
An adjacent attacker can send malicious CDP packets to execute arbitrary code with root privileges or cause a denial of service on Cisco NX-OS devices.
- 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-2022-20824?
CVE-2022-20824 is a high-severity memory corruption vulnerability in Cisco NX-OS Software, published on 25 Aug 2022. 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 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).
Which versions are affected by CVE-2022-20824?
It affects 144 products.
Products include Cisco Mds 9506 Firmware, Cisco Mds 9513 Firmware, Cisco Mds 9706 Firmware, Cisco Mds 9710 Firmware, Cisco Mds 9718 Firmware, Cisco Nexus 1000v Firmware and 138 more.
How do I fix CVE-2022-20824?
No fix has been published for CVE-2022-20824 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-2022-20824 being exploited?
There is no known exploitation of CVE-2022-20824 in the wild and no public exploit code.
Sources
Also known as GHSA-4h78-xq9p-vv4g.