Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0

Summary Image.merge checks the mode of every input band except band 0. If band 0 is a single-band I or F image, the native merge routine reads a pixel pointer that is NULL for those modes and the process crashes. The IPTC plugin reaches this from a plain Image.open followed by a load, and IPTC ha...

GHSA-CP9V-662Q-VVX9 Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0

Summary Image.merge checks the mode of every input band except band 0. If band 0 is a single-band I or F image, the native merge routine reads a pixel pointer that is NULL for those modes and the process crashes. The IPTC plugin reaches this from a plain Image.open followed by a load, and IPTC ha...

PYSEC-2014-22

The 1 loaddjpeg function in JpegImagePlugin.py, 2 Ghostscript function in EpsImagePlugin.py, 3 load function in IptcImagePlugin.py, and 4 copy function in Image.py in Python Image Library PIL 1.1.7 and earlier and Pillow before 2.3.1 do not properly create temporary files, which allow local users...