High severity · published Jan 6, 2025
CVE-2024-55629
Suricata generic detection bypass using TCP urgent support
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
< 7.0.8 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-55629
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-55629
Patch
https://github.com/OISF/suricata/commit/6882bcb3e51bd3cf509fb6569cc30f48d7bb53d7
Patch
https://github.com/OISF/suricata/commit/779f9d8ba35c3f9b5abfa327d3a4209861bd2eb8
Vendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-69wr-vhwg-84h2
Permissions Required
https://redmine.openinfosecfoundation.org/issues/7411
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