| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200801-09"> |
| <title>X.Org X server and Xfont library: Multiple vulnerabilities</title> |
| <synopsis> |
| Multiple vulnerabilities have been discovered in the X.Org X server and |
| Xfont library, allowing for a local privilege escalation and arbitrary code |
| execution. |
| </synopsis> |
| <product type="ebuild">xorg-server libXfont</product> |
| <announced>January 20, 2008</announced> |
| <revised>March 05, 2008: 03</revised> |
| <bug>204362</bug> |
| <bug>208343</bug> |
| <access>remote, local</access> |
| <affected> |
| <package name="x11-base/xorg-server" auto="yes" arch="*"> |
| <unaffected range="ge">1.3.0.0-r5</unaffected> |
| <vulnerable range="lt">1.3.0.0-r5</vulnerable> |
| </package> |
| <package name="x11-libs/libXfont" auto="yes" arch="*"> |
| <unaffected range="ge">1.3.1-r1</unaffected> |
| <vulnerable range="lt">1.3.1-r1</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| The X Window System is a graphical windowing system based on a |
| client/server model. |
| </p> |
| </background> |
| <description> |
| <p> |
| regenrecht reported multiple vulnerabilities in various X server |
| extension via iDefense: |
| </p> |
| <ul> |
| <li>The XFree86-Misc extension does not properly sanitize a parameter |
| within a PassMessage request, allowing the modification of a function |
| pointer (CVE-2007-5760).</li> |
| <li>Multiple functions in the XInput extension do not properly sanitize |
| client requests for swapping bytes, leading to corruption of heap |
| memory (CVE-2007-6427).</li> |
| <li>Integer overflow vulnerabilities in the EVI extension and in the |
| MIT-SHM extension can lead to buffer overflows (CVE-2007-6429).</li> |
| <li>The TOG-CUP extension does not sanitize an index value in the |
| ProcGetReservedColormapEntries() function, leading to arbitrary memory |
| access (CVE-2007-6428).</li> |
| <li>A buffer overflow was discovered in the Xfont library when |
| processing PCF font files (CVE-2008-0006).</li> |
| <li>The X server does not enforce restrictions when a user specifies a |
| security policy file and attempts to open it (CVE-2007-5958).</li> |
| </ul> |
| </description> |
| <impact type="high"> |
| <p> |
| Remote attackers could exploit the vulnerability in the Xfont library |
| by enticing a user to load a specially crafted PCF font file resulting |
| in the execution of arbitrary code with the privileges of the user |
| running the X server, typically root. Local attackers could exploit |
| this and the vulnerabilities in the X.org extensions to gain elevated |
| privileges. If the X server allows connections from the network, these |
| vulnerabilities could be exploited remotely. A local attacker could |
| determine the existence of arbitrary files by exploiting the last |
| vulnerability or possibly cause a Denial of Service. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| Workarounds for some of the vulnerabilities can be found in the X.Org |
| security advisory as listed under References. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All X.Org X server users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r5"</code> |
| <p> |
| All X.Org Xfont library users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.3.1-r1"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5760">CVE-2007-5760</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5958">CVE-2007-5958</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6427">CVE-2007-6427</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6428">CVE-2007-6428</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6429">CVE-2007-6429</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0006">CVE-2008-0006</uri> |
| <uri link="http://lists.freedesktop.org/archives/xorg/2008-January/031918.html">X.Org security advisory</uri> |
| </references> |
| <metadata tag="submitter" timestamp="Sat, 05 Jan 2008 02:03:56 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="bugReady" timestamp="Thu, 17 Jan 2008 15:57:38 +0000"> |
| p-y |
| </metadata> |
| </glsa> |