Red Hat Linux Advisory: cupsMay 27, 2003, 17:25 (1 Talkback[s])
Red Hat Security Advisory
Updated CUPS packages that fix a denial of service vulnerability are now available.
2. Relevant releases/architectures:
Red Hat Linux 7.3 - i386
3. Problem description:
CUPS is a print spooler. CUPS is used as the default print spooler on new installations of Red Hat Linux 9, and has been provided (though not as the default) for Red Hat Linux 7.3 and Red Hat Linux 8.0.
Phil D'Amore of Red Hat discovered a vulnerability in the CUPS IPP (Internet Printing Protocol) implementation. The IPP implementation is single-threaded, which means only one request can be serviced at a time. An attacker could make a partial request that does not time out and therefore creates a denial of service. In order to exploit this bug, an attacker must have the ability to make a TCP connection to the IPP port (by default 631).
All print servers using CUPS should upgrade to these erratum packages, which contain a patch and are not vulnerable to 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 7.3:
Red Hat Linux 8.0:
Red Hat Linux 9:
MD5 sum Package Name
These packages are GPG signed by Red Hat for security. Our key is available at http://www.redhat.com/solutions/security/news/publickey/
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/
Copyright 2003 Red Hat, Inc.
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