full-disclosure - [ GLSA 200606-23 ] KDM: Symlink vulnerability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <200606222148.23175.jaervosz@gentoo.org>
Date: Thu Jun 22 20:48:39 2006
From: jaervosz at gentoo.org (Sune Kloppenborg Jeppesen)
Subject: [ GLSA 200606-23 ] KDM: Symlink vulnerability

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200606-23
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: KDM: Symlink vulnerability
      Date: June 22, 2006
      Bugs: #136201
        ID: 200606-23

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

Synopsis
========

KDM is vulnerable to a symlink vulnerability that can lead to
disclosure of information.

Background
==========

KDE is a feature-rich graphical desktop environment for Linux and
Unix-like Operating Systems. KDM is the KDE Display Manager and is part
of the kdebase package.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  kde-base/kdebase     < 3.5.2-r2                       >= 3.5.2-r2
                                                          *>= 3.4.3-r2
  2  kde-base/kdm         < 3.5.2-r2                       >= 3.5.2-r2
                                                          *>= 3.4.3-r2
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
===========

Ludwig Nussel discovered that KDM could be tricked into allowing users
to read files that would otherwise not be readable.

Impact
======

A local attacker could exploit this issue to obtain potentially
sensitive information that is usually not accessable to the local user
such as shadow files or other user's files. The default Gentoo user
running KDM is root and, as a result, the local attacker can read any
file.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All kdebase users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose kde-base/kdebase

All KDE split ebuild users should upgrade to the latest KDM version:

    # emerge --sync
    # emerge --ask --oneshot --verbose kde-base/kdm

References
==========

  [ 1 ] KDE Security Advisory: KDM symlink attack vulnerability
        http://www.kde.org/info/security/advisory-20060614-1.txt
  [ 2 ] CVE-2006-2449
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2449

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200606-23.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: not available
Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20060622/a5f1c033/attachment.bin