netpbm security update

CentOS Errata and Security Advisory CESA-2005:743-01

The netpbm package contains a library of functions that support
programs for handling various graphics file formats, including .pbm
(portable bitmaps), .pgm (portable graymaps), .pnm (portable anymaps),
.ppm (portable pixmaps) and others.

A bug was found in the way netpbm converts PostScript files into PBM, PGM
or PPM files. An attacker could create a carefully crafted PostScript file
in such a way that it could execute arbitrary commands when the
file is processed by a victim using pstopnm. The Common Vulnerabilities
and Exposures project assigned the name CAN-2005-2471 to this issue.

All users of netpbm should upgrade to the updated packages, which
contain a backported patch to resolve this issue.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2005-August/074247.html

Affected packages:
netpbm
netpbm-devel
netpbm-progs