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May 2017

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2017.05.03 14:14 "Changes to TiffReadEncodedStrip doesn't now check/stop on stripbytecounts=0", by Michael Shiels

We have some corrupted tiffs we use for code
validation/testing/verification.

 

And low and behold once I updated from 3.5.6/3.5.7 era to 4.0.7 - these are
now readable according to the code.

 

Found to be changes to TIFFReadEncodedStrip calling directly into
TIFFReadRawStrip1() for uncompressed files of certain conditions.

 

Without the extra validations being done on the stripbytecounts - the file
becomes valid - which is not good.

 

In our case the strip offsets/lengths were stomped to '0' by something - so
a bit of a nasty file.