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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200907-13">
<title>PulseAudio: Local privilege escalation</title>
A vulnerability in PulseAudio may allow a local user to execute code with
escalated privileges.
<product type="ebuild">pulseaudio</product>
<announced>July 16, 2009</announced>
<revised>July 16, 2009: 01</revised>
<package name="media-sound/pulseaudio" auto="yes" arch="*">
<unaffected range="ge">0.9.9-r54</unaffected>
<vulnerable range="lt">0.9.9-r54</vulnerable>
PulseAudio is a network-enabled sound server with an advanced plug-in
Tavis Ormandy and Julien Tinnes of the Google Security Team discovered
that the pulseaudio binary is installed setuid root, and does not drop
privileges before re-executing itself. The vulnerability has
independently been reported to oCERT by Yorick Koster.
<impact type="high">
A local user who has write access to any directory on the file system
containing /usr/bin can exploit this vulnerability using a race
condition to execute arbitrary code with root privileges.
Ensure that the file system holding /usr/bin does not contain
directories that are writable for unprivileged users.
All PulseAudio users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=media-sound/pulseaudio-0.9.9-r54&quot;</code>
<uri link="">CVE-2009-1894</uri>
<metadata tag="requester" timestamp="Thu, 09 Jul 2009 16:33:42 +0000">
<metadata tag="submitter" timestamp="Thu, 09 Jul 2009 16:51:52 +0000">
<metadata tag="bugReady" timestamp="Thu, 16 Jul 2009 14:13:15 +0000">