libjpeg: information leak (read of uninitialized memory)

The getsos function in jdmarker.c in 1 libjpeg 6b and 2 libjpeg-turbo through 1.3.0, as used in Google Chrome before 31.0.1650.48, Ghostscript, and other products, does not check for certain duplications of component data during the reading of segments that follow Start Of Scan SOS JPEG markers,...