{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2021-12-16T04:07:57.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["x_refsource_MISC"],"url":"https://github.com/OISF/suricata/releases"},{"tags":["x_refsource_MISC"],"url":"https://redmine.openinfosecfoundation.org/issues/4710"},{"tags":["x_refsource_MISC"],"url":"https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942"},{"tags":["x_refsource_MISC"],"url":"https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-45098","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://github.com/OISF/suricata/releases","refsource":"MISC","url":"https://github.com/OISF/suricata/releases"},{"name":"https://redmine.openinfosecfoundation.org/issues/4710","refsource":"MISC","url":"https://redmine.openinfosecfoundation.org/issues/4710"},{"name":"https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942","refsource":"MISC","url":"https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942"},{"name":"https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df","refsource":"MISC","url":"https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df"}]}}},"adp":[{"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/OISF/suricata/releases"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://redmine.openinfosecfoundation.org/issues/4710"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00029.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T19:26:34.251Z"}}]},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2021-45098","datePublished":"2021-12-16T04:07:57.000Z","dateReserved":"2021-12-16T00:00:00.000Z","dateUpdated":"2025-11-03T19:26:34.251Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}