It was found that pngquant, a PNG (Portable Network Graphics) image optimising utility, is susceptible to a buffer overflow write issue triggered by a maliciously crafted png image, which could lead into denial of service or other issues.

For Debian 8 Jessie, this problem has been fixed in version 2.3.0-1+deb8u1.

We recommend that you upgrade your pngquant packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS