Multiple integer overflows were found in libwebp library.
Created libwebp tracking bugs for this issue:
Affects: fedora-all [bug 1389340]
Affects: epel-6 [bug 1389343]
Created mingw-libwebp tracking bugs for this issue:
Affects: fedora-all [bug 1389341]
Affects: epel-6 [bug 1389345]
libwebp includes an example program called gifdec.c which uses pointer arithmetic computations with integers. The affected routines are GIFReadFrame(), ClearRectangle(), and GIFBlendFrames(). The upstream patch uses wider size_t containers instead of integers in the calculations and also uses pointer increments in an attempt to avoid these integer overflows.
Versions of libwebp shipped with Red Hat Enterprise Linux 8 are affected but versions of libwebp shipped with all previous versions of Red Hat Enterprise Linux are not affected since the vulnerable code does not exist in those versions.
Correction: the 1.0.0 version of libwebp shipped with Red Hat Enterprise Linux 8 is NOT affected as it includes the patch for this already.
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):