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.
The old stable distribution (woody) it not vulnerable to this problem.
For the stable distribution (sarge) this problem has been fixed in version 10.0-8sarge1.
For the unstable distribution (sid) this problem has been fixed in version 10.0-10.
We recommend that you upgrade your netpbm-free packages.
MD5 checksums of the listed files are available in the original advisory.