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Category:   Application (Generic)  >   Util-linux Vendors:   [Multiple Authors/Vendors]
(Red Hat Issues Fix for RH Enterprise Linux) util-linux Login Program May Leak Authentication Data to Local Users
SecurityTracker Alert ID:  1008919
SecurityTracker URL:  http://securitytracker.com/id/1008919
CVE Reference:   CVE-2004-0080   (Links to External Site)
Date:  Feb 3 2004
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in 'util-linux' in the login program. A local user may be able to view leaked data, including authentication data.

Red Hat reported that there is a vulnerability in 'util-linux' in the login program, at least as distributed with Red Hat Enterprise Linux 2.1AS.

The report indicates that, in some situations, that application may use a pointer that had been previously freed and subsequently reallocated. As a result, some data leakage may occur. For example, passwords may be written to wtmp.

Red Hat reports that Red Hat Enterprise Linux 3 and Red Hat Linux 9 are not affected.

[Editor's note: It is not clear whether other vendor distrubtions are affected or not.]

Impact:   A local user may be able to view leaked data, including authentication data.
Solution:   Red Hat has released a fix.

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

i386:
Available from Red Hat Network: util-linux-2.11f-20.4.i386.rpm

ia64:
Available from Red Hat Network: util-linux-2.11f-20.4.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

ia64:
Available from Red Hat Network: util-linux-2.11f-20.4.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

i386:
Available from Red Hat Network: util-linux-2.11f-20.4.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

i386:
Available from Red Hat Network: util-linux-2.11f-20.4.i386.rpm

The verification checksums are:

MD5 sum Package Name
00bd8ff344c54363b75ce441b0a19495 2.1AS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
6ce893d86080bbb506116766cbf4348a 2.1AS/en/os/i386/util-linux-2.11f-20.4.i386.rpm
e6cde0a5bd6d89dd8660a3fe83da5a9b 2.1AS/en/os/ia64/util-linux-2.11f-20.4.ia64.rpm
00bd8ff344c54363b75ce441b0a19495 2.1AW/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
e6cde0a5bd6d89dd8660a3fe83da5a9b 2.1AW/en/os/ia64/util-linux-2.11f-20.4.ia64.rpm
00bd8ff344c54363b75ce441b0a19495 2.1ES/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
6ce893d86080bbb506116766cbf4348a 2.1ES/en/os/i386/util-linux-2.11f-20.4.i386.rpm
00bd8ff344c54363b75ce441b0a19495 2.1WS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
6ce893d86080bbb506116766cbf4348a 2.1WS/en/os/i386/util-linux-2.11f-20.4.i386.rpm

Vendor URL:  freshmeat.net/projects/util-linux/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  2.1; Version 3 is not affected

Message History:   This archive entry is a follow-up to the message listed below.
Feb 3 2004 util-linux Login Program May Leak Authentication Data to Local Users



 Source Message Contents

Subject:  [RHSA-2004:056-01] Updated util-linux packages fix information leak


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

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

Synopsis:          Updated util-linux packages fix information leak
Advisory ID:       RHSA-2004:056-01
Issue date:        2004-01-30
Updated on:        2004-02-02
Product:           Red Hat Enterprise Linux
Keywords:          
Cross references:  
Obsoletes:         
CVE Names:         CAN-2004-0080
- ---------------------------------------------------------------------

1. Topic:

Updated util-linux packages that fix an information leak in the login
program are now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

The util-linux package contains a large variety of low-level system
utilities that are necessary for a Linux system to function.

In some situations, the login program could use a pointer that had been
freed and reallocated. This could cause unintentional data leakage.

Note: Red Hat Enterprise Linux 3 is not vulnerable to this issue.

It is recommended that all users upgrade to these updated packages, which
are not vulnerable to this issue.

Red Hat would like to thank Matthew Lee of Fleming College for finding and
reporting this issue.

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):

114742 - CAN-2004-0080 "login" information leak

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

i386:
Available from Red Hat Network: util-linux-2.11f-20.4.i386.rpm

ia64:
Available from Red Hat Network: util-linux-2.11f-20.4.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

ia64:
Available from Red Hat Network: util-linux-2.11f-20.4.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

i386:
Available from Red Hat Network: util-linux-2.11f-20.4.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm

i386:
Available from Red Hat Network: util-linux-2.11f-20.4.i386.rpm



7. Verification:

MD5 sum                          Package Name
- --------------------------------------------------------------------------

00bd8ff344c54363b75ce441b0a19495 2.1AS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
6ce893d86080bbb506116766cbf4348a 2.1AS/en/os/i386/util-linux-2.11f-20.4.i386.rpm
e6cde0a5bd6d89dd8660a3fe83da5a9b 2.1AS/en/os/ia64/util-linux-2.11f-20.4.ia64.rpm
00bd8ff344c54363b75ce441b0a19495 2.1AW/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
e6cde0a5bd6d89dd8660a3fe83da5a9b 2.1AW/en/os/ia64/util-linux-2.11f-20.4.ia64.rpm
00bd8ff344c54363b75ce441b0a19495 2.1ES/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
6ce893d86080bbb506116766cbf4348a 2.1ES/en/os/i386/util-linux-2.11f-20.4.i386.rpm
00bd8ff344c54363b75ce441b0a19495 2.1WS/en/os/SRPMS/util-linux-2.11f-20.4.src.rpm
6ce893d86080bbb506116766cbf4348a 2.1WS/en/os/i386/util-linux-2.11f-20.4.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://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0080

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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)

iD8DBQFAH1wVXlSAg2UNWIIRApUMAJ4tYEJn6KrjTuDw1rM1D/Gy++fZgwCfWJKu
WsRQD2p7agOQVK6zTYqaQeU=
=W0Nv
-----END PGP SIGNATURE-----

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