CVE-2021-45098

Name
CVE-2021-45098
Description
An issue was discovered in Suricata before 6.0.4. It is possible to bypass/evade any HTTP-based signature by faking an RST TCP packet with random TCP options of the md5header from the client side. After the three-way handshake, it's possible to inject an RST ACK with a random TCP md5header option. Then, the client can send an HTTP GET request with a forbidden URL. The server will ignore the RST ACK and send the response HTTP packet for the client's request. These packets will not trigger a Suricata reject action.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://github.com/OISF/suricata/releases
MISC https://redmine.openinfosecfoundation.org/issues/4710
MISC https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942
MISC https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* suricata >= None < 6.0.4

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
suricata 3.15-community 6.0.3-r1 Steve McMaster <code@mcmaster.io> possibly vulnerable