This is not public until February 28th 2003

During an audit of the NetPBM library, Al Viro and Alan Cox found a number
of bugs that are potentially exploitable. These bugs could be exploited by
creating a carefully crafted image in such a way that it executes arbitrary
code when it is processed by either an application from the netpbm-progs
package or an application that uses the vulnerable netpbm library.

One way that an attacker could exploit these vulnerabilities would be to
submit a carefully crafted image to be printed, as the LPRng print spooler
used by default in Red Hat Linux releases uses netpbm utilities to parse
various types of image files.