CVE-2021-45098
Published: Dec 16, 2021
Modified: Nov 3, 2025
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.
| Vendor | Product | Versions |
|---|---|---|
n/a | n/a | affected n/a |
References
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