Vulnerability in X.org Libxdmcp
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- X.org Libxdmcp
- Xorg Libxdmcp — versions 1.1.2
- Red Hat Enterprise Linux — versions 7.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.4
- Red Hat Enterprise Linux Server Eus — versions 7.4, 7.5
- Red Hat Enterprise Linux Workstation — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.gentoo.org/glsa/201704-03 (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2017:1865 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1037919 (VDB Entry, Third Party Advisory, vdb-entry)
- cgit.freedesktop.org/xorg/lib/libXdmcp/commit/ (Third Party Advisory)
- www.securityfocus.com/bid/96480 (VDB Entry, Third Party Advisory, vdb-entry)
- www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/ (Exploit, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/11/msg00024.html (mailing-list)
Frequently asked questions
- What is CVE-2017-2625?
- CVE-2017-2625 is a medium-severity vulnerability in X.org Libxdmcp, classified under Insufficient Entropy. CVSS score: 6.5/10. Published 2018-07-27.
- How severe is CVE-2017-2625?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2017-2625 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.