Chris Evans has reported a vulnerability in Libxml2, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise an application using the library.
The vulnerability is caused due to an error when reallocating memory in xpath.c during the processing of a XPath nodeset. This can be exploited to cause a heap-based buffer overflow via a specially crafted XPath expression.
Successful exploitation may allow execution of arbitrary code.
The vulnerability is reported in version 2.7.8. Other versions may also be affected.
Solution: Fixed in the GIT repository.
Provided and/or discovered by: Chris Evans
Original Advisory: http://scarybeastsecurity.blogspot.com/2011/05/libxml-vulnerability-and-interesting.html
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