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TITLE:
PDFlib-Lite PNG Processing Integer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA35180

VERIFY ADVISORY:
http://secunia.com/advisories/35180/

DESCRIPTION:
Tielei Wang has discovered a vulnerability in PDFlib Lite, which can
potentially be exploited by malicious people to compromise a
vulnerable system.

An integer overflow error exists in the "pdf_process_PNG_data()"
function in libs/pdflib/p_png.c. This can be exploited to cause a
heap-based buffer overflow via a specially crafted PNG file.

Successful exploitation may allow execution of arbitrary code.

This vulnerability is confirmed in version 7.0.4p1. Other versions
may also be affected.

NOTE: Additionally, an embedded version of libpng has been updated to
version 1.2.36 to fix potential security issues.

SOLUTION:
Update to version 7.0.4p4.

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

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