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RedHat: CUPS denial of service vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
RedHat Linux Paul Mitcheson reported a situation where the CUPS Internet PrintingProtocol (IPP) implementation in CUPS versions prior to 1.1.19 would getinto a busy loop.

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated CUPS packages fix denial of service
Advisory ID:       RHSA-2003:275-01
Issue date:        2003-11-03
Updated on:        2003-11-03
Product:           Red Hat Linux
Keywords:          
Cross references:  
Obsoletes:         
CVE Names:         CAN-2003-0788
- ---------------------------------------------------------------------

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.Red Hat.com/help/latest-up2date.pxt

5. Bug IDs fixed  (http://bugzilla.Red Hat.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.Red Hat.com/8.0/en/os/SRPMS/cups-1.1.17-0.9.src.rpm

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

Red Hat Linux 9:

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

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



7. Verification:

MD5 sum                          Package Name
- --------------------------------------------------------------------------
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.Red Hat.com/security/keys.html

You can verify each package with the following command:
    
    rpm --checksig -v 

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 


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@Red Hat.com>.  More contact
details at https://www.Red Hat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.

 
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