Chris Evans has reported some vulnerabilities in xpdf, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially to compromise a user's system.

1) An integer overflow error exists in "Stream.cc:StreamPredictor::StreamPredictor()" when calculating buffer sizes for memory allocation. This can potentially be exploited to overflow the allocated heap memory.

This may be related to #3 in:
SA17897

2) An integer overflow error exists in "Stream.cc::CCITTFaxStream::CCITTFaxStream()" when calculating buffer sizes for memory allocation. This can potentially be exploited to overflow the allocated heap memory.

3) An infinite loop error exists in "Stream.cc::DCTStream::readMarker()" when handling certain malformed input files. This can potentially be exploited to cause a DoS.

4) Missing validation of input parameters in "Stream.cc:DCTStream::readHuffmanTables()" and "Stream.cc:DCTStream::readScanInfo()" can cause out-of-bounds memory access. This can potentially be exploited to overwrite certain memory.

5) Some potential integer overflow error exists in "JBIG2Stream.cc".

The vulnerability affects version 3.01. Other versions may also be affected.

Note: A NULL pointer dereferencing error has also been reported.

Solution
Apply xpdf-3.01pl2.patch.
Further details available in Customer Area

Provided and/or discovered by
Chris Evans

Changelog
Further details available in Customer Area

Original Advisory
Chris Evans:
http://scary.beasts.org/security/b0dfca810501f2da/CESA-2005-003.txt

Gentoo:
http://bugs.gentoo.org/show_bug.cgi?id=117481

KDE:
http://www.kde.org/info/security/advisory-20051207-2.txt

Other references
Further details available in Customer Area

Deep Links
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