[Expat-bugs] [ expat-Bugs-3496608 ] CVE-2012-0876 - Hash DOS attack

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Bugs item #3496608, was opened at 2012-03-03 11:01
Message generated for change (Settings changed) made by kwaclaw
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Category: None
Group: Test Required
Status: Open
Resolution: Fixed
Priority: 7
>Private: Yes
Submitted By: Karl Waclawek (kwaclaw)
Assigned to: Karl Waclawek (kwaclaw)
Summary: CVE-2012-0876 - Hash DOS attack

Initial Comment:
The hash table implementation in Expat can be attacked by a carefully crafted input document where all identifiers hash to the same value.
This leads to a denial of service scenario by forcing hash table lookups to do linear searching.
CVE-2012-0876 (see http://http://www.cve.mitre.org) has been reserved for this issue.
Also discussed on bugs.python.org/issue13703#msg151870 .

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Comment By: Karl Waclawek (kwaclaw)
Date: 2012-03-03 11:20

Message:
Fixed in expat.h rev 1.81 and xmlparse.c rev 1.168.
Thanks to David Malcolm (RedHat) for providing me with the initial version
of the patch.

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You can respond by visiting: 
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