UBUNTU-CVE-2018-6794

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Source
https://ubuntu.com/security/CVE-2018-6794
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6794.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-6794
Upstream
Published
2018-02-07T05:29:00Z
Modified
2025-10-24T04:46:55Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:16.04:LTS / suricata

Package

Name
suricata
Purl
pkg:deb/ubuntu/suricata@3.0-1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.8-1build1
2.0.9-1
2.0.10-1
2.0.10-2
2.0.11-1

3.*

3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "suricata",
            "binary_version": "3.0-1"
        }
    ]
}

Ubuntu:18.04:LTS / suricata

Package

Name
suricata
Purl
pkg:deb/ubuntu/suricata@3.2-2ubuntu3?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2-2ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libhtp-0.5.23-1",
            "binary_version": "3.2-2ubuntu3"
        },
        {
            "binary_name": "suricata",
            "binary_version": "3.2-2ubuntu3"
        },
        {
            "binary_name": "suricata-hyperscan",
            "binary_version": "3.2-2ubuntu3"
        },
        {
            "binary_name": "suricata-oinkmaster",
            "binary_version": "3.2-2ubuntu3"
        }
    ]
}