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                                  CERT-Renater

                       Note d'Information No. 2005/VULN194
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DATE                      : 17/03/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running KDE versions prior to KDE 3.4.

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KDE Security Advisory: Local DCOP denial of service vulnerability
Original Release Date: 20050316
URL: http://www.kde.org/info/security/advisory-20050316-1.txt

0. References
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0396


1. Systems affected:

         All KDE version prior to KDE 3.4 on systems where multiple users
         have access.


2. Overview:

         Sebastian Krahmer of the SUSE LINUX Security Team reported a local
         denial of service vulnerability in KDE's Desktop Communication
         Protocol (DCOP) daemon better known as dcopserver.

         A local user can lock up the dcopserver of arbitrary other users
         on the same machine by stalling the DCOP authentication process.

         Although it is not possible to by pass the authentication process
         this way, it can cause a significant reduction in desktop
         functionality for the affected users.

         The Common Vulnerabilities and Exposures project (cve.mitre.org)
         has assigned the name CAN-2005-0396 to this issue.


3. Impact:

         A local user can lock up the dcopserver of arbitrary other users
         on the same machine. This can cause a significant reduction in
         desktop functionality for the affected users including, but not
         limited to, the inability to browse the internet and the inability
         to start new applications.


4. Solution:

         Upgrade to KDE 3.4.

         For older versions of KDE 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 3.1.x is available from
         ftp://ftp.kde.org/pub/kde/security_patches

         377c49d8224612fbf09f70f3c09d52f5  post-3.1.5-kdelibs-dcop.patch

         A patch for KDE 3.2.x is available from
         ftp://ftp.kde.org/pub/kde/security_patches

         0948701bffb082c65784dc8a2b648ef0  post-3.2.3-kdelibs-dcop.patch

         A patch for KDE 3.3.x is available from
         ftp://ftp.kde.org/pub/kde/security_patches

         7309e259ae1f29be08bbb70e580da3fb  post-3.3.2-kdelibs-dcop.patch


6. Time line and credits:

         21/02/2005 KDE Security informed by SUSE LINUX.
         21/02/2005 Patches applied to KDE CVS.
         02/03/2005 Vendors notified
         16/03/2005 KDE Security Advisory released.

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