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Libxml2 Two Integer Overflow Vulnerabilities
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Secunia Advisory:
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SA32773
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Release Date:
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2008-11-18
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Last Update:
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2008-11-19
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Popularity:
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1,527 views
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | Libxml2 2.x
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Binary Analysis:
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BA612 :: Available for 1 Credit 
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| CVE reference: | CVE-2008-4225
CVE-2008-4226
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Description:
Two vulnerabilities have been reported in Libxml2, which can be exploited by malicious people to cause a DoS (Denial of Service) or to potentially compromise an application using the library.
1) An integer overflow error in the "xmlSAX2Characters()" function can be exploited to trigger a memory corruption via a specially crafted XML file.
Successful exploitation may allow execution of arbitrary code, but requires e.g. that the user is tricked into processing an overly large XML file (2GB or more).
2) An integer overflow error in the "xmlBufferResize()" function can be exploited to trigger the execution of an infinite loop.
The vulnerabilities are reported in version 2.7.2. Other versions may also be affected.
Solution:
Do not process untrusted XML content using the library.
Provided and/or discovered by:
Red Hat credits Drew Yao of Apple Product Security.
Changelog:
2008-11-19: Lowered criticality to "Moderately Critical" due to vulnerability #1 being exploitable only in highly improbable conditions. Additional information provided by Secunia Research.
Original Advisory:
https://bugzilla.redhat.com/show_bug.cgi?id=470466
https://bugzilla.redhat.com/show_bug.cgi?id=470480
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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