CVE-2024-55629CWE-437

Suricata generic detection bypass using TCP urgent support

High · published January 6, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
43.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00543 · 43.7th percentile
Weakness
CWE-437 · Incomplete Model of Endpoint Features
Published
2025-01-06T18:04Z
EPSS history
Timeline
  • 06 JAN 18:04Z
    Suricata generic detection bypass using TCP urgent support
    cvelistv5