CVE-2017-2625
It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys.
Does this matter?
Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.53% probability · 45th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-331, CWE-320
- Affected
- x.org/libxdmcp · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation
- Source
- secalert@redhat.com
EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.