VDB
CVE-2019-18792
CVE-2019-18792
PUBLISHED
CVSS 9.100000381469727 CRITICAL
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. Both linux and windows clients are ignoring the injected packet.
EPSS 2.52% · 83.7th percentile
Risk Scores
CVSS 3.1
9.100000381469727
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS Score
2.52%
83.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | suricata | 0, 3.2-2ubuntu3 |
| Ubuntu:16.04:LTS | suricata | 2.0.10-2, 3.0-1, 0 |
Timeline
- Jan 6, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 28, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 4, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Jan 9, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2019-18792 third-party-advisory
- https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b third-party-advisory
- https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006 third-party-advisory
- https://redmine.openinfosecfoundation.org/issues/3324 third-party-advisory
- https://redmine.openinfosecfoundation.org/issues/3394 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2019-18792 third-party-advisory