CVE-2022-20950 Denial of service in Cisco Firepower Threat Defense Software
An unauthenticated remote attacker can cause a denial of service by sending crafted SIP traffic to trigger a restart of the Snort 3 detection engine.
- 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-2022-20950?
CVE-2022-20950 is a medium-severity denial of service vulnerability in Cisco Secure Firewall Threat Defense, published on 10 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the interaction of SIP and Snort 3 for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to restart. This vulnerability is due to a lack of error-checking when SIP bidirectional flows are being inspected by Snort 3. An attacker could exploit this vulnerability by sending a stream of crafted SIP traffic through an interface on the targeted device. A successful exploit could allow the attacker to trigger a restart of the Snort 3 process, resulting in a denial of service (DoS) condition.
Which versions are affected by CVE-2022-20950?
It affects 1 product.
Products include Cisco Secure Firewall Threat Defense.
How do I fix CVE-2022-20950?
No fix has been published for CVE-2022-20950 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-2022-20950 being exploited?
There is no known exploitation of CVE-2022-20950 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Threat Defense
- CVE-2024-20412 Hardcoded credentials in Cisco Firepower Threat Defense Software
- CVE-2024-20330 Memory corruption in Cisco Firepower Threat Defense Software
- CVE-2024-20339 Cisco Firepower Threat Defense Software for Firepower 2100 Series TLS Denial of Service Vulnerability
- CVE-2024-20351 Cisco Firepower Threat Defense Software Snort Firewall Denial of Service Vulnerability
- CVE-2023-20083 Denial of service in Cisco Firepower Threat Defense Software
Sources
Also known as GHSA-6vj6-45jf-fr3w.