Bug 1048044 - (CVE-2013-6462) CVE-2013-6462 libXfont: stack-based buffer overflow flaw when parsing Glyph Bitmap Distribution Format (BDF) fonts
CVE-2013-6462 libXfont: stack-based buffer overflow flaw when parsing Glyph B...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20140107,repo...
: Security
Depends On: 1048048 1049569 1049684 1049685 1049686 1049687
Blocks: 1048049
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Reported: 2014-01-02 20:39 EST by Murray McAllister
Modified: 2015-11-24 10:38 EST (History)
8 users (show)

See Also:
Fixed In Version: libXfont 1.4.7
Doc Type: Bug Fix
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Last Closed: 2014-01-10 04:57:13 EST
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RHEL 7.3 requirements from Atomic Host:


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Description Murray McAllister 2014-01-02 20:39:56 EST
A stack-based buffer overflow flaw was found in the way the libXfont library, used by the X.Org server, parsed Glyph Bitmap Distribution Format (BDF) fonts. A malicious, local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server.

Acknowledgements:

Red Hat would like to thank the X.Org security team for reporting this issue.
Comment 8 Vincent Danen 2014-01-07 14:13:26 EST
This issue is now public, and is noted as being fixed in libXfont 1.4.7 via the following commit:

http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=4d024ac10f964f6bd372ae0dd14f02772a6e5f63

It is also noted as affecting every version of X from X11R5 to libXfont 1.4.6.


External References:

http://lists.x.org/archives/xorg-announce/2014-January/002389.html
Comment 9 Vincent Danen 2014-01-07 14:15:44 EST
Created libXfont tracking bugs for this issue:

Affects: fedora-all [bug 1049569]
Comment 12 errata-xmlrpc 2014-01-10 04:46:22 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2014:0018 https://rhn.redhat.com/errata/RHSA-2014-0018.html
Comment 13 Tomas Hoger 2014-01-10 05:22:41 EST
Some media coverage:

http://www.theregister.co.uk/2014/01/09/x11_has_privilege_escalation_bug/

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