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Security advisory - Xerces-C++ 2.5.0: Attribute blowup
Oct 02 2004 05:25PM
Amit Klein (AKsecurity) (aksecurity hotpop com)
*** Security Advisory
*** Xerces-C++ 2.5.0: Attribute blowup denial-of-service
*** Author: Amit Klein
*** Release Date: October 2nd, 2004
An attacker can craft a malicious XML document, which uses XML
attributes in a way that inflicts a denial of service condition
on the target machine (XML parser).
The result of this attack is that the XML parser consumes all the CPU
resources for a long period of time (from seconds to minutes,
depending on the size of the payload).
In our experiments, we were able to send attacks (of few hunderd KBs)
that caused the target machines to consume 100% CPU for several
*** Vendor status
Vendor was contacted, and a fix was included for the newly released
version of Xerces-C++ (2.6.0).
Upgrade to Xerces-C++ 2.6.0
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