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Fix TIFF OOB Write error #5175

Merged
merged 2 commits into from Jan 2, 2021
Merged

Fix TIFF OOB Write error #5175

merged 2 commits into from Jan 2, 2021

Commits on Jan 2, 2021

  1. Fix CVE-2020-35654 - OOB Write in TiffDecode.c 

    * In some circumstances with some versions of libtiff (4.1.0+), there
  could be a 4 byte out of bound write when decoding a YCbCr tiff.
* The Pillow code dates to 6.0.0
* Found and reported through Tidelift
    @wiredfool @radarhere
    wiredfool authored and radarhere committed Jan 2, 2021
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  2. Rework ReadTile 

    * Don't malloc for the swap line, just shuffle backwards
* Ensure that im->pixelsize is sanity checked
* Ensure that we're using the right size for the buffer from TiffReadRGBATile
    @wiredfool @radarhere
    wiredfool authored and radarhere committed Jan 2, 2021
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    45a62e9 View commit details
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