← Zuruck zu CVEs

CVE-2021-45098

HIGH

7.5

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung7.5

SchweregradHIGH

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht12/16/2021

Zuletzt geandert11/3/2025

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

debian:debian_linuxoisf:suricata

Referenzen

https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942(cve@mitre.org)

https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df(cve@mitre.org)

https://github.com/OISF/suricata/releases(cve@mitre.org)

https://redmine.openinfosecfoundation.org/issues/4710(cve@mitre.org)

https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/OISF/suricata/releases(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2025/03/msg00029.html(af854a3a-2127-422b-91ae-364da2661108)

https://redmine.openinfosecfoundation.org/issues/4710(af854a3a-2127-422b-91ae-364da2661108)

IOC Korrelationen

Keine Korrelationen erfasst

This product uses data from the NVD API but is not endorsed or certified by the NVD.