[UNIX] Kcheckpass Local Root Vulnerability

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Kcheckpass Local Root Vulnerability
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SUMMARY

Ilja van Sprundel from suresec.org notified the KDE security team about a
serious lock file handling error in kcheckpass that can, in some
configurations, be used to gain root access.

In order for an exploit to succeed, the directory /var/lock has to be
writeable for a user that is allowed to invoke kcheckpass.

DETAILS

Vulnerable Systems:
* All KDE releases starting from KDE 3.2.0 up to including KDE 3.4.2

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2494>
CAN-2005-2494

Solution:
Source code patches have been made available which fix these
vulnerabilities. Contact your OS vendor / binary package provider for
information about how to obtain updated binary packages.

Patch:
Patch for KDE 3.4.2 is available from
ftp://ftp.kde.org/pub/kde/security_patches:
86f7d6fd68568dfd1edcae453958ba31 post-3.4.2-kdebase-kcheckpass.diff

ADDITIONAL INFORMATION

The information has been provided by <mailto:mueller@kde.org> Dirk
Mueller.
The original article can be found at:
<http://www.kde.org/info/security/advisory-20050905-1.txt>
http://www.kde.org/info/security/advisory-20050905-1.txt

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