VDB
DEBIAN-CVE-2021-45098
DEBIAN-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.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | suricata | 0, 0 |
| Debian:14 | suricata | 0, 0, 0 |
| Debian:11 | suricata | 0, 1:6.0.1-3, 0 |
| Debian:13 | suricata | 0, 0, 0 |
Timeline
- Dec 16, 2021 CVE Published
- May 16, 2026 CVE Updated