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[ GLSA 200701-25 ] X.Org X server: Multiple vulnerabilities
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GLSA
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PostPosted: Sat Jan 27, 2007 8:26 pm    Post subject: [ GLSA 200701-25 ] X.Org X server: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: X.Org X server: Multiple vulnerabilities (GLSA 200701-25)
Severity: normal
Exploitable: local
Date: January 27, 2007
Updated: February 26, 2007
Bug(s): #157421
ID: 200701-25

Synopsis


Sean Larsson from iDefense Labs has found multiple vulnerabilities in the
DBE and Render extensions.


Background


The X Window System is a graphical windowing system based on a
client/server model.


Affected Packages

Package: x11-base/xorg-server
Vulnerable: < 1.1.1-r4
Unaffected: >= 1.1.1-r4
Architectures: All supported architectures


Description


Multiple memory corruption vulnerabilities have been found in the
ProcDbeGetVisualInfo() and the ProcDbeSwapBuffers() of the DBE
extension, and ProcRenderAddGlyphs() in the Render extension.


Impact


A local attacker could execute arbitrary code with the privileges of
the user running the X server, typically root.


Workaround


Disable the DBE extension by removing the "Load dbe" directive in the
Module section of xorg.conf, and explicitly disable the Render
extension with ' Option "RENDER" "disable" ' in the Extensions section.

Note: This could affect the functionality of some applications.


Resolution


All X.Org X server users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.1.1-r4"


References

CVE-2006-6101
CVE-2006-6102
CVE-2006-6103


Last edited by GLSA on Sun Apr 17, 2011 4:23 am; edited 3 times in total
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