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Category: Application (Generic) > CUPS (Common UNIX Printing System)

Vendors: Easy Software Products

(Red Hat Issues Fix) CUPS Case Sensitive Location Directive May Let Remote Users Bypass Access Controls

SecurityTracker Alert ID: 1014484

SecurityTracker URL: http://securitytracker.com/id?1014484

CVE Reference: CAN-2004-2154 (Links to External Site)

Date: Jul 14 2005

Impact: Host/resource access via network

Fix Available: Yes Vendor Confirmed: Yes

Advisory: Red Hat Advisory

Description: In May 2004, a vulnerability was reported in CUPS. A remote user can bypass access control lists in certain cases.

The printer name in the Location directive in the 'cupsd.conf' configuration file is case sensitive. A remote user can supply a printer name containing uppercase or lowercase letters that are different from the case specified in the directive to bypass the directive's access control lists. As a result, a remote or local user can print to a password-protected target queue without having to supply the password.

'adji.df.uba' reported this vulnerability.

Impact: A remote user may be able to bypass Location directive access controls.

Vendor URL: www.cups.org/str.php?L700 (Links to External Site)

Cause: Access control error

Underlying OS: Linux (Red Hat Enterprise)

Reported By: bugzilla@redhat.com

Message History: This archive entry is a follow-up to the message listed below.

Jul 14 2005

CUPS Case Sensitive Location Directive May Let Remote Users Bypass Access Controls

Source Message Contents

Date: Thu, 14 Jul 2005 13:50:24 -0400
From: bugzilla@redhat.com
Subject: [RHSA-2005:571-01] Moderate: cups security update

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

Synopsis:          Moderate: cups security update
Advisory ID:       RHSA-2005:571-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-571.html
Issue date:        2005-07-14
Updated on:        2005-07-14
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2004-2154
- ---------------------------------------------------------------------

1. Summary:

Updated CUPS packages that fix a security issue are now available for Red
Hat Enterprise Linux 3.

This update has been rated as having moderate security impact by the Red Hat
Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem description:

The Common UNIX Printing System (CUPS) provides a portable printing layer for
UNIX(R) operating systems.

When processing a request, the CUPS scheduler would use case-sensitive
matching on the queue name to decide which authorization policy should be
used.  However, queue names are not case-sensitive.  An unauthorized user
could print to a password-protected queue without needing a password.  The
Common Vulnerabilities and Exposures project has assigned the name
CAN-2005-2154 to this issue.

Please note that the version of CUPS included in Red Hat Enterprise Linux 4
is not vulnerable to this issue.

All users of CUPS should upgrade to these erratum packages which contain a
backported patch to correct this issue.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  Use Red Hat
Network to download and update your packages.  To launch the Red Hat
Update Agent, use the following command:

    up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

    http://www.redhat.com/docs/manuals/enterprise/

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

162405 - CAN-2004-2154 <Location ...> directive is case-sensitive in cupsd.conf but should not


6. RPMs required:

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/cups-1.1.17-13.3.29.src.rpm
81c72be8ece7d629a9a73ffa32916c41  cups-1.1.17-13.3.29.src.rpm

i386:
36bdfb6c6aa5eb58d5fe41b457ac7361  cups-1.1.17-13.3.29.i386.rpm
72307b7ee7bba211a5546a28362ac2a6  cups-devel-1.1.17-13.3.29.i386.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm

ia64:
36d374d2e1abacc34ce965750541626b  cups-1.1.17-13.3.29.ia64.rpm
7f3441b9e9879be1087bcd0607b1ab66  cups-devel-1.1.17-13.3.29.ia64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
a96ac4679c8b522d5433f23fade03f07  cups-libs-1.1.17-13.3.29.ia64.rpm

ppc:
86f8571af07d8d5fa479ed729a13af37  cups-1.1.17-13.3.29.ppc.rpm
ff62e1f6ae117e1db87a4299a4bd33a9  cups-devel-1.1.17-13.3.29.ppc.rpm
6e334775b2dbb8c09c25e011cb69cba4  cups-libs-1.1.17-13.3.29.ppc.rpm
9f23a140336a37a76bf6a9dbcbcdb9ff  cups-libs-1.1.17-13.3.29.ppc64.rpm

s390:
54d08a23a20b825b5c0c1e59ea0fe54b  cups-1.1.17-13.3.29.s390.rpm
eb62a6ea4f287a6eab9a0157f909e9e4  cups-devel-1.1.17-13.3.29.s390.rpm
e067385a2f2e9ab235bd9f98943626c7  cups-libs-1.1.17-13.3.29.s390.rpm

s390x:
d400e53066c2c831ae85155c9b8b0de0  cups-1.1.17-13.3.29.s390x.rpm
e3c00601315da00de3b8980a2c93aec8  cups-devel-1.1.17-13.3.29.s390x.rpm
e067385a2f2e9ab235bd9f98943626c7  cups-libs-1.1.17-13.3.29.s390.rpm
f6bb5b5be02c4acd32561a7a857c7eae  cups-libs-1.1.17-13.3.29.s390x.rpm

x86_64:
a692e1999e3ee1a95f3053d894675100  cups-1.1.17-13.3.29.x86_64.rpm
7f56302afb665afafcf61577a31bb1d6  cups-devel-1.1.17-13.3.29.x86_64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
56379591a637d0085b0838e0d97f0111  cups-libs-1.1.17-13.3.29.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/cups-1.1.17-13.3.29.src.rpm
81c72be8ece7d629a9a73ffa32916c41  cups-1.1.17-13.3.29.src.rpm

i386:
36bdfb6c6aa5eb58d5fe41b457ac7361  cups-1.1.17-13.3.29.i386.rpm
72307b7ee7bba211a5546a28362ac2a6  cups-devel-1.1.17-13.3.29.i386.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm

x86_64:
a692e1999e3ee1a95f3053d894675100  cups-1.1.17-13.3.29.x86_64.rpm
7f56302afb665afafcf61577a31bb1d6  cups-devel-1.1.17-13.3.29.x86_64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
56379591a637d0085b0838e0d97f0111  cups-libs-1.1.17-13.3.29.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/cups-1.1.17-13.3.29.src.rpm
81c72be8ece7d629a9a73ffa32916c41  cups-1.1.17-13.3.29.src.rpm

i386:
36bdfb6c6aa5eb58d5fe41b457ac7361  cups-1.1.17-13.3.29.i386.rpm
72307b7ee7bba211a5546a28362ac2a6  cups-devel-1.1.17-13.3.29.i386.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm

ia64:
36d374d2e1abacc34ce965750541626b  cups-1.1.17-13.3.29.ia64.rpm
7f3441b9e9879be1087bcd0607b1ab66  cups-devel-1.1.17-13.3.29.ia64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
a96ac4679c8b522d5433f23fade03f07  cups-libs-1.1.17-13.3.29.ia64.rpm

x86_64:
a692e1999e3ee1a95f3053d894675100  cups-1.1.17-13.3.29.x86_64.rpm
7f56302afb665afafcf61577a31bb1d6  cups-devel-1.1.17-13.3.29.x86_64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
56379591a637d0085b0838e0d97f0111  cups-libs-1.1.17-13.3.29.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/cups-1.1.17-13.3.29.src.rpm
81c72be8ece7d629a9a73ffa32916c41  cups-1.1.17-13.3.29.src.rpm

i386:
36bdfb6c6aa5eb58d5fe41b457ac7361  cups-1.1.17-13.3.29.i386.rpm
72307b7ee7bba211a5546a28362ac2a6  cups-devel-1.1.17-13.3.29.i386.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm

ia64:
36d374d2e1abacc34ce965750541626b  cups-1.1.17-13.3.29.ia64.rpm
7f3441b9e9879be1087bcd0607b1ab66  cups-devel-1.1.17-13.3.29.ia64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
a96ac4679c8b522d5433f23fade03f07  cups-libs-1.1.17-13.3.29.ia64.rpm

x86_64:
a692e1999e3ee1a95f3053d894675100  cups-1.1.17-13.3.29.x86_64.rpm
7f56302afb665afafcf61577a31bb1d6  cups-devel-1.1.17-13.3.29.x86_64.rpm
5dc46b9df27b30286b6604c6a1e6ee98  cups-libs-1.1.17-13.3.29.i386.rpm
56379591a637d0085b0838e0d97f0111  cups-libs-1.1.17-13.3.29.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-2154

8. Contact:

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

Copyright 2005 Red Hat, Inc.

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