Debian Security Advisory DSA 878-1 – A buffer overflow has been identified in the pnmtopng component of the netpbm package, a set of graphics conversion tools. This vulnerability could allow an attacker to execute arbitrary code as a local user by providing a specially crafted PNM file.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41072/dsa-878-1.txt
Source: https://packetstormsecurity.com/files/41072/Debian-Linux-Security-Advisory-878-1.html