drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Zahlenüberläufe in LibXfont, X.org
Name: |
Zahlenüberläufe in LibXfont, X.org |
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ID: |
200609-07 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mi, 13. September 2006, 20:47 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3739
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3740 |
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Applikationen: |
X11, X11 |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200609-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: High Title: LibXfont, monolithic X.org: Multiple integer overflows Date: September 13, 2006 Bugs: #145513 ID: 200609-07
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Synopsis ========
Some buffer overflows were discovered in the CID font parser, potentially resulting in the execution of arbitrary code with elevated privileges.
Background ==========
libXfont is the X.Org Xfont library, some parts are based on the FreeType code base.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-libs/libXfont < 1.2.1 >= 1.2.1 2 x11-base/xorg-x11 < 7.0 >= 7.0 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. -------------------------------------------------------------------
Description ===========
Several integer overflows have been found in the CID font parser.
Impact ======
A remote attacker could exploit this vulnerability by enticing a user to load a malicious font file resulting in the execution of arbitrary code with the permissions of the user running the X server which typically is the root user. A local user could exploit this vulnerability to gain elevated privileges.
Workaround ==========
Disable CID-encoded Type 1 fonts by removing the "type1" module and replacing it with the "freetype" module in xorg.conf.
Resolution ==========
All libXfont users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.1"
All monolithic X.org users are advised to migrate to modular X.org.
References ==========
[ 1 ] CVE-2006-3739 http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3739 [ 2 ] CVE-2006-3740 http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3740
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200609-07.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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