CVE-2019-18792
An issue was discovered in Suricata 5.0.0. It is possible to bypass/ev ...
Sévérité par source
Le label propre à Trivy est CRITICAL. Critique selon NVD.
Description
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.
Paquets affectés et versions corrigées
| Source | Paquet | Corrigé en |
|---|---|---|
| debian 10 | suricata | pas de correctif indiqué |
| debian 11 | suricata | 1:5.0.2-1 |
| debian 13 | suricata | 1:5.0.2-1 |
| debian 14 | suricata | 1:5.0.2-1 |
| debian 8 | suricata | 2.0.7-2+deb8u5 |
| debian 9 | suricata | pas de correctif indiqué |
| echo | suricata | 1:5.0.2-1 |
Références
- 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