| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200907-13"> |
| <title>PulseAudio: Local privilege escalation</title> |
| <synopsis> |
| A vulnerability in PulseAudio may allow a local user to execute code with |
| escalated privileges. |
| </synopsis> |
| <product type="ebuild">pulseaudio</product> |
| <announced>July 16, 2009</announced> |
| <revised>July 16, 2009: 01</revised> |
| <bug>276986</bug> |
| <access>local</access> |
| <affected> |
| <package name="media-sound/pulseaudio" auto="yes" arch="*"> |
| <unaffected range="ge">0.9.9-r54</unaffected> |
| <vulnerable range="lt">0.9.9-r54</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| PulseAudio is a network-enabled sound server with an advanced plug-in |
| system. |
| </p> |
| </background> |
| <description> |
| <p> |
| 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. |
| </p> |
| </description> |
| <impact type="high"> |
| <p> |
| 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. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| Ensure that the file system holding /usr/bin does not contain |
| directories that are writable for unprivileged users. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All PulseAudio users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=media-sound/pulseaudio-0.9.9-r54"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1894">CVE-2009-1894</uri> |
| </references> |
| <metadata tag="requester" timestamp="Thu, 09 Jul 2009 16:33:42 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="submitter" timestamp="Thu, 09 Jul 2009 16:51:52 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="bugReady" timestamp="Thu, 16 Jul 2009 14:13:15 +0000"> |
| rbu |
| </metadata> |
| </glsa> |