(RHSA-2004:096) wu-ftpd security update

The wu-ftpd package contains the Washington University FTP (File Transfer
Protocol) server daemon. FTP is a method of transferring files between
machines.

Glenn Stewart discovered a flaw in wu-ftpd. When configured with
“restricted-gid home”, an authorized user could use this flaw to
circumvent the configured home directory restriction by using chmod. The
Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned
the name CAN-2004-0148 to this issue.

Michael Hendrickx found a flaw in the S/Key login handling. On servers
using S/Key authentication, a remote attacker could overflow a buffer and
potentially execute arbitrary code.

Users of wu-ftpd are advised to upgrade to this updated package, which
contains backported security patches and is not vulnerable to these issues.