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TITLE:
wxWidgets Double Free and Integer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA35292

VERIFY ADVISORY:
http://secunia.com/advisories/35292/

DESCRIPTION:
Tielei Wang has discovered some vulnerabilities in wxWidgets, which
can be exploited by malicious people to potentially compromise a
user's system.

1) A double free error within the "wxPNGHandler::LoadFile()" function
in common/imagpng.cpp can be exploited to potentially execute
arbitrary code via a specially crafted PNG file.

2) An integer overflow error exists within the
"wxTIFFHandler::LoadFile()" function in common/imagtiff.cpp. This can
be exploited to cause a heap-based buffer overflow and potentially
execute arbitrary code via a specially crafted TIFF file.

The vulnerabilities are confirmed in version 2.8.10. Other versions
may also be affected.

SOLUTION:
Vulnerability #1 is fixed in the SVN repository.
http://trac.wxwidgets.org/changeset/60875

Do not process untrusted PNG or TIFF files.

PROVIDED AND/OR DISCOVERED BY:
Tielei Wang, ICST-ERCIS

ORIGINAL ADVISORY:
http://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH/docs/changes.txt

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