CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 1CVE-2021-45098
https://notcve.org/view.php?id=CVE-2021-45098
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. • 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 •
CVSS: 9.8EPSS: 0%CPEs: 2EXPL: 0CVE-2021-37592
https://notcve.org/view.php?id=CVE-2021-37592
Suricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a certain sequence of segments. Suricata versiones anteriores a 5.0.8 y versiones 6.x anteriores a 6.0.4, permite una evasión de TCP por medio de un cliente con una pila TCP/IP diseñada que puede enviar una determinada secuencia de segmentos • https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942 https://github.com/OISF/suricata/releases https://redmine.openinfosecfoundation.org/issues/4569 • CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 0CVE-2021-35063
https://notcve.org/view.php?id=CVE-2021-35063
Suricata before 5.0.7 and 6.x before 6.0.3 has a "critical evasion." Suricata versiones anteriores a 5.0.7 y versiones 6.x anteriores a 6.0.3, presenta una "evasión crítica" • https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990835 https://bugzilla.redhat.com/show_bug.cgi?id=1980453 https://forum.suricata.io/t/suricata-6-0-3-and-5-0-7-released/1489 https://github.com/OISF/suricata/releases https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JU27J2ZYG6FBDL5CERE6FBB4ZFGHOROE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XEP7PWY4LRT2R4MFLV7JIJRYZEZ7RQFL https://security-tracker.debian.org/tracker/ •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2019-18625
https://notcve.org/view.php?id=CVE-2019-18625
An issue was discovered in Suricata 5.0.0. It was possible to bypass/evade any tcp based signature by faking a closed TCP session using an evil server. After the TCP SYN packet, it is possible to inject a RST ACK and a FIN ACK packet with a bad TCP Timestamp option. The client will ignore the RST ACK and the FIN ACK packets because of the bad TCP Timestamp option. Both linux and windows client are ignoring the injected packets. • https://github.com/OISF/suricata/commit/9f0294fadca3dcc18c919424242a41e01f3e8318 https://github.com/OISF/suricata/commit/ea0659de7640cf6a51de5bbd1dbbb0414e4623a0 https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html https://redmine.openinfosecfoundation.org/issues/3286 https://redmine.openinfosecfoundation.org/issues/3395 •
CVSS: 9.1EPSS: 1%CPEs: 3EXPL: 2CVE-2019-18792
https://notcve.org/view.php?id=CVE-2019-18792
An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. • https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006 https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html https://redmine.openinfosecfoundation.org/issues/3324 https://redmine.openinfosecfoundation.org/issues/3394 • CWE-436: Interpretation Conflict •