Updated netpbm packages that fix a security issue are now available for Red
Hat Enterprise Linux 2.1, 3, and 4.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
The netpbm package contains a library of functions for editing and
converting between various graphics file formats, including .pbm (portable
bitmaps), .pgm (portable graymaps), .pnm (portable anymaps), .ppm (portable
pixmaps) and others. The package includes no interactive tools and is
primarily used by other programs (eg CGI scripts that manage web-site
An input validation flaw was discovered in the GIF-to-PNM converter
(giftopnm) shipped with the netpbm package. An attacker could create a
carefully crafted GIF file which could cause giftopnm to crash or possibly
execute arbitrary code as the user running giftopnm. (CVE-2008-0554)
All users are advised to upgrade to these updated packages which contain a
backported patch which resolves this issue.