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TITLE:
Libxml2 Two Integer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA32773

VERIFY ADVISORY:
http://secunia.com/advisories/32773/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
Libxml2 2.x
http://secunia.com/advisories/product/3080/

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.

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.

ORIGINAL ADVISORY:
https://bugzilla.redhat.com/show_bug.cgi?id=470466
https://bugzilla.redhat.com/show_bug.cgi?id=470480

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