A vulnerability in OptiPNG might result in user-assisted execution of arbitrary code.
|Package||media-gfx/optipng on all architectures|
|Affected versions||< 0.6.2-r1|
|Unaffected versions||>= 0.6.2-r1|
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information.
Roy Tam reported a use-after-free vulnerability in the GIFReadNextExtension() function in lib/pngxtern/gif/gifread.c leading to a memory corruption when reading a GIF image.
A remote attacker could entice a user to process a specially crafted GIF image, possibly resulting in the execution of arbitrary code with the privileges of the user running the application, or a Denial of Service.
There is no known workaround at this time.
All OptiPNG users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-gfx/optipng-0.6.2-r1"
March 09, 2009
March 09, 2009: 01