KDM passwordless login vulnerability

KDE Security Advisory: KDM passwordless login vulnerability
Original Release Date: 2007-09-19
URL: http://www.kde.org/info/security/advisory-20070919-1.txt


0. References
        CVE-2007-4569


1. Systems affected:

·       KDM as shipped with KDE 3.3.0 up to including 3.5.7.
KDE 3.2.x and
·       older and newer versions than KDE 3.5.7 are not
affected.·


2. Overview:

·       KDM can be tricked into performing a password-less
login even for
·       accounts with a password set under certain
circumstances, namely
        autologin to be configured and "shutdown with
password" enabled.

        This vulnerability was discovered and reported by
Kees Huijgen.


3. Impact:

·       KDM might allow a normal user to login as another
user or even
·       root without properly supplying login credentials.

4. 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.


5. Patch:

        A patch for KDE 3.5.0 - KDE 3.5.7 is available from
        ftp://ftp.kde.org/pub/kde/security_patches :

        ee6c57046902c5b5a32a4699558baafc 
post-3.5.7-kdebase-kdm.diff

        A patch for KDE 3.3.0 - KDE 3.4.2 is available from
        ftp://ftp.kde.org/pub/kde/security_patches :

        ad7333a336bdbaef7fae5e74cd12119b 
post-3.4.2-kdebase-kdm.diff
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