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...

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...

Design/Logic Flaw

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...

PT-2020-6918 · Suricata · Suricata

Name of the Vulnerable Software and Affected Versions: Suricata version 5.0.0 Description: A problem was discovered in Suricata where it is possible to bypass or evade any TCP-based signature by faking a closed TCP session using a malicious server. After the TCP SYN packet, it is possible to inje...