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69 lines
2.2 KiB
69 lines
2.2 KiB
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200907-13">
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<title>PulseAudio: Local privilege escalation</title>
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<synopsis>
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A vulnerability in PulseAudio may allow a local user to execute code with
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escalated privileges.
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</synopsis>
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<product type="ebuild">pulseaudio</product>
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<announced>July 16, 2009</announced>
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<revised>July 16, 2009: 01</revised>
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<bug>276986</bug>
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<access>local</access>
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<affected>
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<package name="media-sound/pulseaudio" auto="yes" arch="*">
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<unaffected range="ge">0.9.9-r54</unaffected>
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<vulnerable range="lt">0.9.9-r54</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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PulseAudio is a network-enabled sound server with an advanced plug-in
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system.
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</p>
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</background>
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<description>
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<p>
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Tavis Ormandy and Julien Tinnes of the Google Security Team discovered
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that the pulseaudio binary is installed setuid root, and does not drop
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privileges before re-executing itself. The vulnerability has
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independently been reported to oCERT by Yorick Koster.
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</p>
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</description>
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<impact type="high">
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<p>
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A local user who has write access to any directory on the file system
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containing /usr/bin can exploit this vulnerability using a race
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condition to execute arbitrary code with root privileges.
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</p>
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</impact>
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<workaround>
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<p>
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Ensure that the file system holding /usr/bin does not contain
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directories that are writable for unprivileged users.
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</p>
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</workaround>
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<resolution>
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<p>
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All PulseAudio users should upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=media-sound/pulseaudio-0.9.9-r54"</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1894">CVE-2009-1894</uri>
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</references>
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<metadata tag="requester" timestamp="Thu, 09 Jul 2009 16:33:42 +0000">
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rbu
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</metadata>
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<metadata tag="submitter" timestamp="Thu, 09 Jul 2009 16:51:52 +0000">
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rbu
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</metadata>
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<metadata tag="bugReady" timestamp="Thu, 16 Jul 2009 14:13:15 +0000">
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rbu
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</metadata>
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</glsa>
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