CVE-2017-2625

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.

Metrics

CVSS 3.0 5.5/10CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-331 CWE-320

Affected software

Vendor	Product	Versions
Xorg	libXdmcp	1.1.2

References

http://www.securityfocus.com/bid/96480Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037919Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1865Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2625Issue Tracking, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a1643e29eb1fThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00024.html
https://security.gentoo.org/glsa/201704-03Third Party Advisory
https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/Exploit, Third Party Advisory
http://www.securityfocus.com/bid/96480Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037919Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1865Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2625Issue Tracking, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a1643e29eb1fThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00024.html
https://security.gentoo.org/glsa/201704-03Third Party Advisory
https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/Exploit, Third Party Advisory

Timeline

Published: Jul 27, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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