| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| suricata (PTS) | jessie, jessie (lts) | 2.0.7-2+deb8u5 | vulnerable |
| stretch | 3.2.1-1+deb9u1 | vulnerable |
| buster, buster (lts) | 1:4.1.2-2+deb10u2 | vulnerable |
| bullseye | 1:6.0.1-3 | vulnerable |
| bookworm | 1:6.0.10-1 | fixed |
| sid, trixie | 1:7.0.8-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| suricata | source | jessie | (unfixed) | end-of-life | | |
| suricata | source | (unstable) | 1:6.0.4-1 | | | |
Notes
[bullseye] - suricata <no-dsa> (Minor issue)
[buster] - suricata <no-dsa> (Minor issue)
[stretch] - suricata <no-dsa> (Minor issue)
https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942
https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df
https://redmine.openinfosecfoundation.org/issues/4710