Some vulnerabilities have been reported in libTIFF, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.

1) A boundary error in the "TIFFFetchShortPair()" function in tif_dirread.c can be exploited to cause a stack-based overflow via a TIFF image file with a specially crafted "DotRange", "YCbCrSubsampling", "HalftoneHints", or "PageNumber" tag.

2) Boundary errors within the decoders for JPEG, PixarLog, and NeXT RLE streams can be exploited to cause heap-based buffer overflows.

3) An infinite loop in the "EstimateStripByteCounts()" function can be exploited to cause a DoS.

4) Various unchecked arithmetic operations, including range check operations, can be exploited to bypass certain sanity checks.

5) A flaw within the handling of custom tags can lead to abnormal behaviour.

Successful exploitation allows crashing applications linked against libTIFF or execution of arbitrary code.

Solution
Update to version 3.9.0beta.
Further details available to Secunia VIM customers

Provided and/or discovered by
Tavis Ormandy, Google Security Team.

Changelog
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