CVE-2022-20766 Cisco ATA 190 Series Analog Telephone Adapter firmware Cisco Discovery Protocol Denial of Service Vulnerability
Remote attackers can cause a denial of service on Cisco ATA 190 devices by sending crafted Cisco Discovery Protocol packets, requiring firmware updates.
- 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-2022-20766?
CVE-2022-20766 is a medium-severity denial of service vulnerability in Cisco Analog Telephone Adaptor (ATA) Software, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Adaptive Telephone Adapter firmware could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to an out-of-bounds read when processing Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause a service restart.Cisco has released firmware updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-125
Which versions are affected by CVE-2022-20766?
How do I fix CVE-2022-20766?
No fix has been published for CVE-2022-20766 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-20766 being exploited?
There is no known exploitation of CVE-2022-20766 in the wild and no public exploit code.
Sources
Also known as GHSA-7q63-79xq-2jj4.