CVE catalog

CVE-2019-18792

UBUNTU-CVE-2019-18792

[CVE catalog]

Severity
Unknown
Published
Updated
Source
[NVD] · [CVE record]
EPSS
2.52% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debiansuricata131:5.0.2-1fixed
Debiansuricata141:5.0.2-1fixed
Ubuntusuricata16.042.0.8-1build1vulnerable
Ubuntusuricata16.042.0.9-1vulnerable
Ubuntusuricata16.042.0.10-1vulnerable
Ubuntusuricata16.042.0.10-2vulnerable
Ubuntusuricata16.042.0.11-1vulnerable
Ubuntusuricata16.043.0-1vulnerable
Ubuntusuricata18.043.2-2ubuntu3vulnerable

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debiansuricatadeb131:5.0.2-1Not reportedDEBIAN-CVE-2019-18792Not reported
Debiansuricatadeb141:5.0.2-1Not reportedDEBIAN-CVE-2019-18792Not reported

OpenFactory catalog packages

[Debian 13 (Trixie)]

  • [suricata]Fixed
    Details (4)

    • 1:7.0.10-1+deb13u4 · amd64 · trixie

      Fixed · Fixed: 1:5.0.2-1

      pypi · suricata · debian · 13

    • 1:7.0.10-1+deb13u4 · arm64 · trixie

      Fixed · Fixed: 1:5.0.2-1

      pypi · suricata · debian · 13

    • 1:8.0.6-1~bpo13+1 · amd64 · trixie-backports

      Fixed · Fixed: 1:5.0.2-1

      pypi · suricata · debian · 13

    • 1:8.0.6-1~bpo13+1 · arm64 · trixie-backports

      Fixed · Fixed: 1:5.0.2-1

      pypi · suricata · debian · 13

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database]