Insufficient Entropy Affecting libxkbcommon-devel package, versions <0:0.7.1-1.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-RHEL7-LIBXKBCOMMONDEVEL-4721849
- published26 Jul 2021
- disclosed28 Feb 2017
Introduced: 28 Feb 2017
CVE-2017-2625 (opens in a new tab)How to fix?
Upgrade RHEL:7 libxkbcommon-devel to version 0:0.7.1-1.el7 or higher.
This issue was patched in RHSA-2017:1865.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libxkbcommon-devel package and not the libxkbcommon-devel package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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
- http://www.securityfocus.com/bid/96480
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2625
- https://cgit.freedesktop.org/xorg/lib/libXdmcp/commit/?id=0554324ec6bbc2071f5d1f8ad211a1643e29eb1f
- https://access.redhat.com/security/cve/CVE-2017-2625
- https://security.gentoo.org/glsa/201704-03
- https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/
- https://lists.debian.org/debian-lts-announce/2019/11/msg00024.html
- https://access.redhat.com/errata/RHSA-2017:1865
- http://www.securitytracker.com/id/1037919
- https://bugzilla.redhat.com/show_bug.cgi?id=1424987