[SECURITY] Fedora 15 Update: expat-2.1.0-1.fc15

[updates at fedoraproject.org]

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Fedora Update Notification
FEDORA-2012-6996
2012-05-01 00:21:07
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Name        : expat
Product     : Fedora 15
Version     : 2.1.0
Release     : 1.fc15
URL         : http://www.libexpat.org/
Summary     : An XML parser library
Description :
This is expat, the C library for parsing XML, written by James Clark. Expat
is a stream oriented XML parser. This means that you register handlers with
the parser prior to starting the parse. These handlers are called when the
parser discovers the associated structures in the document being parsed. A
start tag is an example of the kind of structures for which you may
register handlers.

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Update Information:

This update includes expat 2.1.0, which fixes includes a fix for a security issue.

A specially-crafted set of keys could trigger hash function collisions, which degrade dictionary performance by changing hash table operations complexity from an expected/average O(1) to the worst case O(n). Reporters were able to find colliding strings efficiently using meet in the middle attack. (CVE-2012-0876)
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ChangeLog:

* Mon Mar 26 2012 Joe Orton <jorton at redhat.com> - 2.1.0-1
- update to 2.1.0 (#806602)
* Fri Jan 13 2012 Fedora Release Engineering <rel-eng at lists.fedoraproject.org> - 2.0.1-12
- Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass_Rebuild
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References:

  [ 1 ] Bug #806602 - expat-2.1.0 is available
        https://bugzilla.redhat.com/show_bug.cgi?id=806602
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This update can be installed with the "yum" update program.  Use 
su -c 'yum update expat' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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