CVE-2017-2625

MEDIUM

libXdmcp < 1.1.2 - Session Key Brute Force via Weak Entropy

Title source: llm

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.

References (8)

Core 8

Core References

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/201704-03

Issue Tracking, Third Party Advisory x_refsource_confirm

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2625

Third Party Advisory vendor-advisory x_refsource_redhat

https://access.redhat.com/errata/RHSA-2017:1865

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1037919

Third Party Advisory x_refsource_confirm

https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a1643e29eb1f

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/96480

Exploit, Third Party Advisory x_refsource_misc

https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/

Mailing List mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2019/11/msg00024.html

Scores

CVSS v3 6.5

EPSS 0.0053

EPSS Percentile 41.5%

Attack Vector LOCAL

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

Details

CWE

CWE-320 CWE-331

Status published

Products (8)

redhat/enterprise_linux 7.0

redhat/enterprise_linux_desktop 7.0

redhat/enterprise_linux_server 7.0

redhat/enterprise_linux_server_aus 7.4

redhat/enterprise_linux_server_eus 7.4

redhat/enterprise_linux_server_eus 7.5

redhat/enterprise_linux_workstation 7.0

x.org/libxdmcp < 1.1.2

Published Jul 27, 2018

Tracked Since Feb 18, 2026