| Name | CVE-2019-18625 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2087-1, ELA-1162-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| suricata (PTS) | jessie, jessie (lts) | 2.0.7-2+deb8u5 | fixed |
| stretch | 3.2.1-1+deb9u1 | vulnerable |
| buster, buster (lts) | 1:4.1.2-2+deb10u2 | fixed |
| bullseye | 1:6.0.1-3 | fixed |
| bookworm | 1:6.0.10-1 | fixed |
| sid, trixie | 1:7.0.8-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[buster] - suricata <no-dsa> (Minor issue)
[stretch] - suricata <no-dsa> (Minor issue)
https://github.com/OISF/suricata/commit/9f0294fadca3dcc18c919424242a41e01f3e8318 (suricata-5.0.1)
https://github.com/OISF/suricata/commit/ea0659de7640cf6a51de5bbd1dbbb0414e4623a0 (master-4.1.x)
https://redmine.openinfosecfoundation.org/issues/3286
https://redmine.openinfosecfoundation.org/issues/3395