Upgraded ProFTPD packages are available for Slackware 8.1, 9.0 and - -current. These fix a security issue where an attacker could gain a root shell by downloading a specially crafted file.
Here are the details from the Slackware 9.0 ChangeLog:
Tue Sep 23 14:43:10 PDT 2003 n/proftpd-1.2.8p-i486-1.tgz: Upgraded to proftpd-1.2.8p (patched). This fixes a security problem in ProFTPD. From http://www.proftpd.org:
X-Force Research at ISS has discovered a remote exploit in ProFTPD's handling of ASCII translations that an attacker, by downloading a carefully crafted file, can exploit and gain a root shell. The source distributions on ftp.proftpd.org have all been replaced with patched versions. All ProFTPD users are strongly urged to upgrade to one of the patched versions as soon as possible.
Note that the upgraded package does not change the displayed version number to 1.2.8p (it remains 1.2.8), but we've verified the source code to make sure that this is in fact the patched version. We recommend all sites running ProFTPD upgrade to the new package right away. ( Security fix )
WHERE TO FIND THE NEW PACKAGES:
Updated package for Slackware 8.1: ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/packages/proftpd-1.2.8p-i386-1.tgz
Updated package for Slackware 9.0: ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/proftpd-1.2.8p-i386-1.tgz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/proftpd-1.2.8p-i486-1.tgz
Slackware 8.1 package: 8b31d10bab91a0d4a22c7eac69a90087 proftpd-1.2.8p-i386-1.tgz
Slackware 9.0 package: 391d5e24bade1ff98281465d230ddad5 proftpd-1.2.8p-i386-1.tgz
Slackware -current package: 2636a2306a6acb0d8726995de9013678 proftpd-1.2.8p-i486-1.tgz
Upgrade using upgradepkg (as root): > upgradepkg proftpd-1.2.8p-i386-1.tgz