CVE-2024-55629 Suricata generic detection bypass using TCP urgent support
Attackers can bypass Suricata detection by using TCP urgent data, causing the IDS to analyze traffic differently than endpoints.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-55629?
CVE-2024-55629 is a high-severity vulnerability in Oisf Suricata, published on 6 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.8, TCP streams with TCP urgent data (out of band data) can lead to Suricata analyzing data differently than the applications at the TCP endpoints, leading to possible evasions. Suricata 7.0.8 includes options to allow users to configure how to handle TCP urgent data. In IPS mode, you can use a rule such as drop tcp any any -> any any (sid:1; tcp.flags:U*;) to drop all the packets with urgent flag set.
Which versions are affected by CVE-2024-55629?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2024-55629?
Upgrade to a fixed version.
Is CVE-2024-55629 being exploited?
There is no known exploitation of CVE-2024-55629 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2024-55629, GHSA-69wr-vhwg-84h2, UBUNTU-CVE-2024-55629.