CVE-2022-20687 Memory corruption in Cisco Analog Telephone Adaptor (ATA) Software

Medium 5.3 Published 7 Dec 2022 Updated 3 Aug 2024

Unauthenticated remote attackers can execute arbitrary code and cause denial of service on Cisco ATA devices via malicious LLDP packets due to missing length validation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-20687?

CVE-2022-20687 is a medium-severity memory corruption vulnerability in Cisco Analog Telephone Adaptor (ATA) Software, published on 7 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) functionality of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device and cause the LLDP service to restart. These vulnerabilities are due to missing length validation of certain LLDP packet header fields. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to an affected device. A successful exploit could allow the attacker to execute code on the affected device and cause LLDP to restart unexpectedly, resulting in a denial of service (DoS) condition.

Weakness: CWE-1284, CWE-120

Which versions are affected by CVE-2022-20687?

It affects 3 products.

Products include Cisco Ata 190 Firmware, Cisco Ata 191 Firmware, Cisco Ata 192 Firmware.

How do I fix CVE-2022-20687?

No fix has been published for CVE-2022-20687 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-2022-20687 being exploited?

There is no known exploitation of CVE-2022-20687 in the wild and no public exploit code.

Sources

Also known as GHSA-jhh2-qcrp-6q44.