Red Hat Linux Advisory: CUPS

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Red Hat Security Advisory

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1. Topic:

Updated CUPS packages that fix a problem where CUPS can hang are
now available.

2. Relevant releases/architectures:

Red Hat Linux 8.0 – i386
Red Hat Linux 9 – i386

3. Problem description:

CUPS is a print spooler.

Paul Mitcheson reported a situation where the CUPS Internet
Printing Protocol (IPP) implementation in CUPS versions prior to
1.1.19 would get into a busy loop. This could result in a denial of
service. In order to exploit this bug an attacker would need to
have the ability to make a TCP connection to the IPP port (by
default 631).

Users of CUPS are advised to install these updated packages,
which contain a backported security patch and are not vulnerable to
this issue.

These packages also fix a problem with the LPD backend that
could cause jobs to be repeated.

4. Solution:

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:

up2date

This will start an interactive process that will result in the
appropriate RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the up2date
client with an updated certificate. The latest version of up2date
is available from the Red Hat FTP site and may also be downloaded
directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla
for more info):

97958 – IPP at 100% processor doing nothing useful. 107256 –
duplicated printing

6. RPMs required:

Red Hat Linux 8.0:

SRPMS:
ftp://updates.redhat.com/8.0/en/os/SRPMS/cups-1.1.17-0.9.src.rpm

i386:
ftp://updates.redhat.com/8.0/en/os/i386/cups-1.1.17-0.9.i386.rpm

ftp://updates.redhat.com/8.0/en/os/i386/cups-devel-1.1.17-0.9.i386.rpm

ftp://updates.redhat.com/8.0/en/os/i386/cups-libs-1.1.17-0.9.i386.rpm

Red Hat Linux 9:

SRPMS:

ftp://updates.redhat.com/9/en/os/SRPMS/cups-1.1.17-13.3.0.3.src.rpm

i386:

ftp://updates.redhat.com/9/en/os/i386/cups-1.1.17-13.3.0.3.i386.rpm

ftp://updates.redhat.com/9/en/os/i386/cups-devel-1.1.17-13.3.0.3.i386.rpm

ftp://updates.redhat.com/9/en/os/i386/cups-libs-1.1.17-13.3.0.3.i386.rpm

7. Verification:

MD5 sum Package Name

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b1a11f2d32869f71d81a51699d0d1161
8.0/en/os/SRPMS/cups-1.1.17-0.9.src.rpm
58703f2e272be1f437dc08afdfd56cbf
8.0/en/os/i386/cups-1.1.17-0.9.i386.rpm
0f4fd001995c32f1073170506e551c7f
8.0/en/os/i386/cups-devel-1.1.17-0.9.i386.rpm
51e4409b5ba1c4a36b5c4a9448379d68
8.0/en/os/i386/cups-libs-1.1.17-0.9.i386.rpm
0a0d87d587bc144f43fbc358e7ddc3b0
9/en/os/SRPMS/cups-1.1.17-13.3.0.3.src.rpm
4419de18b94b013ae0ec939ae5bf415b
9/en/os/i386/cups-1.1.17-13.3.0.3.i386.rpm
b1af1f42aae099e96e29113e0bab0e6f
9/en/os/i386/cups-devel-1.1.17-13.3.0.3.i386.rpm
bef46344f1619d0be4ad0bc6f04dafdf
9/en/os/i386/cups-libs-1.1.17-13.3.0.3.i386.rpm

These packages are GPG signed by Red Hat for security. Our key
is available from https://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:

md5sum <filename>

8. References:

http://www.cups.org/str.php?L315+P0+S0+C0+I0+E0+Q

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0788

9. Contact:

The Red Hat security contact is <secalert@redhat.com>. More
contact details at https://www.redhat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.