Vulnerabilidades / CVE-2019-18792

crítica

CVE-2019-18792

An issue was discovered in Suricata 5.0.0. It is possible to bypass/ev ...

Publicada Modificada CWE 436
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.

Severidad por fuente

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

La etiqueta propia de Trivy es CRITICAL. Crítica según NVD.

Descripción

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.

Paquetes afectados y versiones corregidas

FuentePaqueteCorregido en
debian 10suricatasin corrección indicada
debian 11suricata1:5.0.2-1
debian 13suricata1:5.0.2-1
debian 14suricata1:5.0.2-1
debian 8suricata2.0.7-2+deb8u5
debian 9suricatasin corrección indicada
echosuricata1:5.0.2-1

Referencias

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.