FreeBSD : php-gd and gd -- Buffer over-read into uninitialized memory (5033e2fc-98ec-4ef5-8e0b-87cfbbc73081)
Medium Nessus Plugin ID 103478
SynopsisThe remote FreeBSD host is missing one or more security-related updates.
DescriptionPHP developers report :
The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.
SolutionUpdate the affected packages.