Red Hat Linux Advisory: wu-ftpdJul 31, 2003, 20:54 (1 Talkback[s])
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Red Hat Security Advisory
Updated wu-ftpd packages are now available that fix a remotely exploitable security issue.
2. Relevant releases/architectures:
Red Hat Linux 7.1 - i386
3. Problem description:
The wu-ftpd package contains the Washington University FTP (File Transfer Protocol) server daemon. FTP is a method of transferring files between computers on a network.
An off-by-one bug has been discovered in versions of wu-ftpd up to and including 2.6.2. On a vulnerable system, a remote attacker would be able to exploit this bug to gain root privileges.
Red Hat Linux 7.1 and 7.2 contain a version of wu-ftpd that is affected by this bug, although it is believed this issue will not be remotely exploitable due to compiler padding of the buffer targeted for the overflow.
Red Hat Linux 7.3 and 8.0 contain a version of wu-ftpd that is remotely exploitable.
Red Hat advises all users of wu-ftpd to upgrade to these erratum packages, which contain a security patch and is not vulnerable to this issue.
Red Hat would like to thank Wojciech Purczynski and Janusz Niewiadomski of ISEC Security Research for their responsible disclosure of this issue.
Before applying this update, make sure all previously released errata relevant to your system have been applied.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory only contains the desired RPMs.
Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command:
This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.
5. RPMs required:
Red Hat Linux 7.1:
Red Hat Linux 7.1 for iSeries (64 bit):
Red Hat Linux 7.1 for pSeries (64 bit):
Red Hat Linux 7.2:
Red Hat Linux 7.3:
Red Hat Linux 8.0:
MD5 sum Package Name
These packages are GPG signed by Red Hat for security. Our key is available from http://www.redhat.com/security/keys.html
You can verify each package with the following command:
rpm --checksig -v <filename>
If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command:
The Red Hat security contact is <firstname.lastname@example.org>. More contact details at http://www.redhat.com/solutions/security/news/contact.html
Copyright 2003 Red Hat, Inc.
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