Debian Security Advisory DSA 797-1 – zsync, a file transfer program, includes a modified local copy of the zlib library, and is vulnerable to certain bugs fixed previously in the zlib package.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/39818/dsa-797-1.txt
Source: https://packetstormsecurity.com/files/39818/Debian-Linux-Security-Advisory-797-1.html