CVEvulnerability
CVE-2019-18625
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-01-06
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
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.
Affected configurations
• oisf suricata 5.0.0
• debian debian linux 8.0
References
- https://github.com/OISF/suricata/commit/9f0294fadca3dcc18c919424242a41e01f3e8318 Patch, Third Party Advisory
- https://github.com/OISF/suricata/commit/ea0659de7640cf6a51de5bbd1dbbb0414e4623a0 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html Mailing List, Third Party Advisory
- https://redmine.openinfosecfoundation.org/issues/3286 Third Party Advisory
- https://redmine.openinfosecfoundation.org/issues/3395 Third Party Advisory
- https://github.com/OISF/suricata/commit/9f0294fadca3dcc18c919424242a41e01f3e8318 Patch, Third Party Advisory
- https://github.com/OISF/suricata/commit/ea0659de7640cf6a51de5bbd1dbbb0414e4623a0 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html Mailing List, Third Party Advisory
- https://redmine.openinfosecfoundation.org/issues/3286 Third Party Advisory
- https://redmine.openinfosecfoundation.org/issues/3395 Third Party Advisory