CVE-2017-2625

Published: 27 July 2018

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.

Priority

Low

CVSS 3 base score: 5.5

Status

Package Release Status
libxdmcp
Launchpad, Ubuntu, Debian
Upstream
Released (1:1.1.2-2)
Ubuntu 21.04 (Hirsute Hippo)
Released (1:1.1.2-3)
Ubuntu 20.10 (Groovy Gorilla)
Released (1:1.1.2-3)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1:1.1.2-3)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1:1.1.2-3)
Ubuntu 16.04 LTS (Xenial Xerus) Needed

Ubuntu 14.04 ESM (Trusty Tahr) Needed

Patches:
Upstream: https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a1643e29eb1f
Upstream: https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=6d1aee0310001eca8f6ded9814a2a70b3a774896