CVE-2017-2625

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.

Affected

Xorg · libXdmcp

CVSS v3.0 NVD

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

CVSS v3.0 REDHAT

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

CVSS v2.0 NVD

2.1 LOWAV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS

0.53% chance of exploitation in the next 30 days, 44th percentile

Published

2018-07-27

Updated

2024-08-05

Proof-of-concept exploits (1)

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

Security advisories

• http://www.securityfocus.com/bid/96480
• http://www.securitytracker.com/id/1037919
• https://access.redhat.com/errata/RHSA-2017:1865
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2625
• https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a16…
• https://security.gentoo.org/glsa/201704-03
• https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg

References

• CVE Record
• NVD entry