| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200710-11"> |
| <title>X Font Server: Multiple Vulnerabilities</title> |
| <synopsis> |
| Three vulnerabilities have been discovered in the X Font Server possibly |
| allowing local attackers to gain elevated privileges. |
| </synopsis> |
| <product type="ebuild">xfs</product> |
| <announced>October 12, 2007</announced> |
| <revised>October 12, 2007: 01</revised> |
| <bug>185660</bug> |
| <bug>194606</bug> |
| <access>local</access> |
| <affected> |
| <package name="x11-apps/xfs" auto="yes" arch="*"> |
| <unaffected range="ge">1.0.5</unaffected> |
| <vulnerable range="lt">1.0.5</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| The X.Org X11 X Font Server provides a standard mechanism for an X |
| server to communicate with a font renderer. |
| </p> |
| </background> |
| <description> |
| <p> |
| iDefense reported that the xfs init script does not correctly handle a |
| race condition when setting permissions of a temporary file |
| (CVE-2007-3103). Sean Larsson discovered an integer overflow |
| vulnerability in the build_range() function possibly leading to a |
| heap-based buffer overflow when handling "QueryXBitmaps" and |
| "QueryXExtents" protocol requests (CVE-2007-4568). Sean Larsson also |
| discovered an error in the swap_char2b() function possibly leading to a |
| heap corruption when handling the same protocol requests |
| (CVE-2007-4990). |
| </p> |
| </description> |
| <impact type="high"> |
| <p> |
| The first issue would allow a local attacker to change permissions of |
| arbitrary files to be world-writable by performing a symlink attack. |
| The second and third issues would allow a local attacker to execute |
| arbitrary code with privileges of the user running the X Font Server, |
| usually xfs. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There is no known workaround at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All X Font Server users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=x11-apps/xfs-1.0.5"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3103">CVE-2007-3103</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4568">CVE-2007-4568</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4990">CVE-2007-4990</uri> |
| </references> |
| <metadata tag="requester" timestamp="Thu, 11 Oct 2007 20:30:03 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="submitter" timestamp="Thu, 11 Oct 2007 21:39:17 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="bugReady" timestamp="Thu, 11 Oct 2007 21:39:34 +0000"> |
| rbu |
| </metadata> |
| </glsa> |