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Vulnerabilities / CVE-2017-12176

critical

CVE-2017-12176

xorg-x11-server: Unvalidated extra length in ProcEstablishConnection

Published Modified CWE 391, 20
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.5CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium), Ubuntu (medium).

Description

xorg-x11-server before 1.19.5 was missing extra length validation in ProcEstablishConnection function allowing malicious X client to cause X server to crash or possibly execute arbitrary code.

Affected packages and fixed versions

SourcePackageFixed in
alpine 3.10xorg-server1.19.5-r0
alpine 3.11xorg-server1.19.5-r0
alpine 3.12xorg-server1.19.5-r0
alpine 3.13xorg-server1.19.5-r0
alpine 3.14xorg-server1.19.5-r0
alpine 3.15xorg-server1.19.5-r0
alpine 3.16xorg-server1.19.5-r0
alpine 3.17xorg-server1.19.5-r0
alpine 3.18xorg-server1.19.5-r0
alpine 3.19xorg-server1.19.5-r0
alpine 3.20xorg-server1.19.5-r0
alpine 3.21xorg-server1.19.5-r0
Show all 48 entries from 36 sources
SourcePackageFixed in
alpine 3.10xorg-server1.19.5-r0
alpine 3.11xorg-server1.19.5-r0
alpine 3.12xorg-server1.19.5-r0
alpine 3.13xorg-server1.19.5-r0
alpine 3.14xorg-server1.19.5-r0
alpine 3.15xorg-server1.19.5-r0
alpine 3.16xorg-server1.19.5-r0
alpine 3.17xorg-server1.19.5-r0
alpine 3.18xorg-server1.19.5-r0
alpine 3.19xorg-server1.19.5-r0
alpine 3.20xorg-server1.19.5-r0
alpine 3.21xorg-server1.19.5-r0
alpine 3.22xorg-server1.19.5-r0
alpine 3.23xorg-server1.19.5-r0
alpine 3.24xorg-server1.19.5-r0
alpine 3.6xorg-server1.19.5-r0
alpine 3.7xorg-server1.19.5-r0
alpine 3.8xorg-server1.19.5-r0
alpine 3.9xorg-server1.19.5-r0
alpine edgexorg-server1.19.5-r0
debian 11xorg-server2:1.19.5-1
debian 12xorg-server2:1.19.5-1
debian 13xorg-server2:1.19.5-1
debian 14xorg-server2:1.19.5-1
debian 7xorg-server2:1.12.4-6+deb7u8
debian 8xorg-server2:1.16.4-1+deb8u2
debian 9xorg-server2:1.19.2-1+deb9u2
echoxorg-server2:1.19.5-1
Red Hatxorg-x11-serverno fix listed
Red Hatxorg-x11-server-Xdmxno fix listed
Red Hatxorg-x11-server-Xephyrno fix listed
Red Hatxorg-x11-server-Xnestno fix listed
Red Hatxorg-x11-server-Xorgno fix listed
Red Hatxorg-x11-server-Xvfbno fix listed
Red Hatxorg-x11-server-Xwaylandno fix listed
Red Hatxorg-x11-server-commonno fix listed
Red Hatxorg-x11-server-develno fix listed
Red Hatxorg-x11-server-sourceno fix listed
root.io debian 11rootio-xorg-server2:1.19.5-1
root.io debian 12rootio-xorg-server2:1.19.5-1
ubuntu 14.04xorg-server2:1.15.1-0ubuntu2.11
ubuntu 14.04xorg-server-lts-xenial2:1.18.3-1ubuntu2.3~trusty4
ubuntu 14.04-ESMxorg-server2:1.15.1-0ubuntu2.11
ubuntu 16.04xorg-server2:1.18.4-0ubuntu0.7
ubuntu 16.04xorg-server-hwe-16.042:1.19.3-1ubuntu1~16.04.4
ubuntu 16.04-ESMxorg-server2:1.18.4-0ubuntu0.7
ubuntu 16.04-ESMxorg-server-hwe-16.042:1.19.3-1ubuntu1~16.04.4
ubuntu 17.04xorg-server2:1.19.3-1ubuntu1.3

References

All 10 references

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.