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KDE KDM Login Password Check Security Bypass
Secunia Advisory: SA26894
Release Date: 2007-09-20
Popularity: 7,066 views

Critical:
Not critical
Impact: Security Bypass
Where: Local system
Solution Status: Vendor Patch

Software:KDE 3.x

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CVE reference:CVE-2007-4569


Description:
KDE has acknowledged a security issue in KDM, which can be exploited by malicious, local users to bypass certain security restrictions.

The security issue is caused due to an error when checking the credentials during login, which can be exploited to log in to an account (potentially including "root") without specifying a valid password.

Successful exploitation may require special circumstances, e.g. that "autologin" and "shutdown with password" are enabled.

The security issue is reported in versions 3.3.0 through 3.5.7.

Solution:
Apply patches.

KDE 3.5.0 through 3.5.7:
ftp://ftp.kde.org/pub/kde/security_patches/post-3.5.7-kdebase-kdm.diff

KDE 3.3.0 through 3.4.2:
ftp://ftp.kde.org/pub/kde/security_patches/post-3.4.2-kdebase-kdm.diff

Provided and/or discovered by:
The vendor credits Kees Huijgen.

Original Advisory:
http://www.kde.org/info/security/advisory-20070919-1.txt


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