CVE-2014-7272: Race Condition
First published: Mon Oct 06 2014(Updated: )
It was reported that sddm has several issues leading to local privilege escalation: [1] The xauth cookie handling code calls xauth binary via popen() as root, which in turn dumps and creates files as root in users ~. [2] After xauth has done its job, sddm chowns() the ~/.Xauthority file to user. This is a race and a local root exploit. [3] The .xsession-errors file is created in ~ but as root. This allows to destroy arbitrary system files. Upstream patch is at [4]. [1] <a href="https://bugzilla.suse.com/show_bug.cgi?id=897788#c7">https://bugzilla.suse.com/show_bug.cgi?id=897788#c7</a> [2] <a href="https://bugzilla.suse.com/show_bug.cgi?id=897788#c8">https://bugzilla.suse.com/show_bug.cgi?id=897788#c8</a> [3] <a href="https://bugzilla.suse.com/show_bug.cgi?id=897788#c9">https://bugzilla.suse.com/show_bug.cgi?id=897788#c9</a> [4] <a href="https://github.com/sddm/sddm/pull/280">https://github.com/sddm/sddm/pull/280</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sddm Project Sddm | <0.10.0 | |
| Fedoraproject Fedora | =20 | |
| Fedoraproject Fedora | =21 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.suse.com/show_bug.cgi?id=897788#c7
- https://bugzilla.suse.com/show_bug.cgi?id=897788#c8
- https://bugzilla.suse.com/show_bug.cgi?id=897788#c9
- https://github.com/sddm/sddm/pull/280
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1149629
- http://meetbot.fedoraproject.org/fedora-blocker-review/2014-10-22/f21-blocker-review.2014-10-22-16.03.log.txt
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=949792&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=949792&action=edit
- https://bugzilla.redhat.com/show_bug.cgi?id=1149610
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/141494.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/141550.html
- http://www.openwall.com/lists/oss-security/2014/10/06/4
- collector/nvd-index
- agent/type
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/severity
- agent/last-modified-date
- agent/weakness
- agent/remedy
- agent/author
- agent/description
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2014-7272
- agent/tags
- agent/trending
- vendor/sddm project
- canonical/sddm project sddm
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/20
- version/fedoraproject fedora/21