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Category:   Application (Generic)  >   CUPS Vendors:   Easy Software Products
(Fedora Issues Fix for FC1) CUPS Browsing Can Be Disabled By Remote Users
SecurityTracker Alert ID:  1011751
SecurityTracker URL:  http://securitytracker.com/id/1011751
CVE Reference:   CVE-2004-0558   (Links to External Site)
Date:  Oct 17 2004
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Common UNIX Printing System (CUPS). A remote user can disable browsing.

Debian reported that a remote user can send a sepcially crafted UDP packet containing illegal URL characters to cupsd on port 631 to cause denial of service conditions.

The flaw resides in 'scheduler/dirsvc.c'.

Alvaro Martinez Echevarria is credited with discovering and patching the flaw.

Impact:   A remote user can disable CUPS browsing.
Solution:   Fedora has released a fix.

Fedora Core 1:

SRPM:
http://download.fedoralegacy.org/fedora/1/updates/SRPMS/cups-1.1.19-13.2.legacy.src.rpm

i386:
http://download.fedoralegacy.org/fedora/1/updates/i386/cups-1.1.19-13.2.legacy.i386.rpm
http://download.fedoralegacy.org/fedora/1/updates/i386/cups-devel-1.1.19-13.2.legacy.i386.rpm
http://download.fedoralegacy.org/fedora/1/updates/i386/cups-libs-1.1.19-13.2.legacy.i386.rpm

Vendor URL:  www.cups.org/ (Links to External Site)
Cause:   Exception handling error, Input validation error
Underlying OS:  Linux (Red Hat Fedora)
Underlying OS Comments:  FC1

Message History:   This archive entry is a follow-up to the message listed below.
Sep 15 2004 CUPS Browsing Can Be Disabled By Remote Users



 Source Message Contents

Subject:  [Full-Disclosure] [FLSA-2004:2072] Updated CUPS packages fix security vulnerability



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-----------------------------------------------------------------------
               Fedora Legacy Update Advisory

Synopsis:          Updated CUPS packages fix security vulnerability
Advisory ID:       FLSA:2072
Issue date:        2004-10-16
Product:           Red Hat Linux, Fedora Core
Keywords:          Bugfix
Cross references:  https://bugzilla.fedora.us/show_bug.cgi?id=3D2072
CVE Names:         CAN-2004-0558
-----------------------------------------------------------------------


-----------------------------------------------------------------------
1. Topic:

Updated cups packages that fix a denial of service vulnerability are now
available.

The Common UNIX Printing System (CUPS) is a print spooler.

2. Relevant releases/architectures:

Red Hat Linux 9 - i386
Fedora Core 1 - i386

3. Problem description:

Alvaro Martinez Echevarria reported a bug in the CUPS Internet Printing
Protocol (IPP) implementation in versions of CUPS prior to 1.1.21. An
attacker could send a carefully crafted UDP packet to the IPP port which
could cause CUPS to stop listening to the port and result in a denial of
service. In order to exploit this bug, an attacker would need to have
the ability to send a UDP packet to the IPP port (by default 631). The
Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2004-0558 to this issue.

All users of cups should upgrade to these updated packages, which
contain a backported patch as well as a fix for a non-exploitable
off-by-one bug.

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 yum and apt.  Many
people find this an easier way to apply updates.  To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the
appropriate RPMs being upgraded on your system.  This assumes that you
have yum or apt-get configured for obtaining Fedora Legacy content.
Please visit http://www fedoralegacy.org/docs for directions on how to
configure yum and apt-get.

5. Bug IDs fixed:

http://bugzilla.fedora.us - 2072 - CAN-2004-0558 - CUPS denial of
service

6. RPMs required:

Red Hat Linux 9:

SRPM:
http://download.fedoralegacy.org/redhat/9/updates/SRPMS/cups-1.1.17-13.3.0.=
6.legacy.src.rpm

i386:
http://download.fedoralegacy.org/redhat/9/updates/i386/cups-1.1.17-13.3.0.6=
.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/9/updates/i386/cups-devel-1.1.17-13=
.3.0.6.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/9/updates/i386/cups-libs-1.1.17-13.=
3.0.6.legacy.i386.rpm

Fedora Core 1:

SRPM:
http://download.fedoralegacy.org/fedora/1/updates/SRPMS/cups-1.1.19-13.2.le=
gacy.src.rpm

i386:
http://download.fedoralegacy.org/fedora/1/updates/i386/cups-1.1.19-13.2.leg=
acy.i386.rpm
http://download.fedoralegacy.org/fedora/1/updates/i386/cups-devel-1.1.19-13=
.2.legacy.i386.rpm
http://download.fedoralegacy.org/fedora/1/updates/i386/cups-libs-1.1.19-13.=
2.legacy.i386.rpm

7. Verification:

SHA1 sum                                 Package Name
---------------------------------------------------------------------------

dc9e67863c6ed358eca94f36f04c2549be49bee7=20
redhat/9/updates/i386/cups-1.1.17-13.3.0.6.legacy.i386.rpm
fc7fd1c2c7ad79e2c419b5440e6b0e0a88b2e276=20
redhat/9/updates/i386/cups-devel-1.1.17-13.3.0.6.legacy.i386.rpm
39f6b741f82f6e566351d15f7ec384f0cde9a17e=20
redhat/9/updates/i386/cups-libs-1.1.17-13.3.0.6.legacy.i386.rpm
ff063b1392b2841153d5dc234c5f3ed6d54d63e4=20
redhat/9/updates/SRPMS/cups-1.1.17-13.3.0.6.legacy.src.rpm
e7684dfcd7142714848be20e318e5c58aed2b481=20
fedora/1/updates/i386/cups-1.1.19-13.2.legacy.i386.rpm
8dbb4ea34d20de5b70e1672e60794fcfe5021f4b=20
fedora/1/updates/i386/cups-devel-1.1.19-13.2.legacy.i386.rpm
369439d5c253a361ffd64f892efc448c62d54e94=20
fedora/1/updates/i386/cups-libs-1.1.19-13.2.legacy.i386.rpm
8b69b1f1c661a5c75dfadcfb85a19fd712e5f904=20
fedora/1/updates/SRPMS/cups-1.1.19-13.2.legacy.src.rpm

These packages are GPG signed by Fedora Legacy for security.  Our key is
available from http://www.fedoralegacy org/about/security.php

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 sha1sum with the following command:

    sha1sum <filename>

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCAN-2004-0558
http://www.cups.org/str.php?L863

9. Contact:

The Fedora Legacy security contact is <secnotice@fedoralegacy.org>. More
project details at http://www.fedoralegacy.org

---------------------------------------------------------------------


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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

 
 


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