CVE catalog

CVE-2018-6794

DEBIAN-CVE-2018-6794

[CVE catalog]

Severity
Medium · CVSS 5.5CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Published
Updated
Source
[NVD] · [CVE record]
EPSS
23.69% · Oct 25, 2026

Suricata before 4.0.4 is prone to an HTTP detection bypass vulnerability in detect.c and stream-tcp.c. If a malicious server breaks a normal TCP flow and sends data before the 3-way handshake is complete, then the data sent by the malicious server will be accepted by web clients such as a web browser or Linux CLI utilities, but ignored by Suricata IDS signatures. This mostly affects IDS signatures for the HTTP protocol and TCP stream content; signatures for TCP packets will inspect such network traffic as usual.

Vulnerable and fixed packages

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

DistributionPackageReleaseVersionStatus
Debiansuricata131:4.0.4-1fixed
Debiansuricata141:4.0.4-1fixed
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
Debiansuricatadeb131:4.0.4-1Not reportedDEBIAN-CVE-2018-6794Not reported
Debiansuricatadeb141:4.0.4-1Not reportedDEBIAN-CVE-2018-6794Not reported

OpenFactory catalog packages

[Debian 13 (Trixie)]

  • [suricata]Fixed
    Details (4)

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

      Fixed · Fixed: 1:4.0.4-1

      pypi · suricata · debian · 13

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

      Fixed · Fixed: 1:4.0.4-1

      pypi · suricata · debian · 13

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

      Fixed · Fixed: 1:4.0.4-1

      pypi · suricata · debian · 13

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

      Fixed · Fixed: 1:4.0.4-1

      pypi · suricata · debian · 13

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]