VDB
CVE-2021-45098
CVE-2021-45098
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.40% · 61.2th percentile
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score
0.40%
61.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| debian | debian_linux | 9.0, 10.0, 11.0 |
| oisf | suricata | 0 |
| n/a | n/a | n/a |
Timeline
- Dec 16, 2021 EPSS Score
- Dec 16, 2021 CVE Published
- Feb 8, 2022 EPSS Score
- Apr 3, 2022 EPSS Score
- May 28, 2022 EPSS Score
- Jul 22, 2022 EPSS Score
- Sep 14, 2022 EPSS Score
- Nov 7, 2022 EPSS Score
- Jan 1, 2023 EPSS Score
- Feb 24, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Apr 19, 2023 EPSS Score
References
- https://github.com/OISF/suricata/releases url
- https://redmine.openinfosecfoundation.org/issues/4710 url
- https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942 url
- https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df url
- https://lists.debian.org/debian-lts-announce/2025/03/msg00029.html url
- https://nvd.nist.gov/vuln/detail/CVE-2021-45098 advisory