SecuritySpace - CVE-2021-45098

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CVE ID: 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.

Test IDs: None available

Cross References: Common Vulnerability Exposure (CVE) ID: CVE-2021-45098
https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942
https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df
https://github.com/OISF/suricata/releases
https://redmine.openinfosecfoundation.org/issues/4710

CVE ID:	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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-45098 https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942 https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df https://github.com/OISF/suricata/releases https://redmine.openinfosecfoundation.org/issues/4710