GLSA 200606-23: KDM: Symlink vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	KDM: Symlink vulnerability
Date:	06/22/2006
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	Architecture(s)
kde-base/kdebase	< 3.5.2-r2	>= 3.5.2-r2	All supported architectures
kde-base/kdm	< 3.5.2-r1	>= 3.5.2-r1	All 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

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@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.