[EXPL] Multiple Vulnerabilities in Konversation (Exploit)

From: SecuriTeam (support_at_securiteam.com)
Date: 01/23/05

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Date: 23 Jan 2005 17:14:59 +0200

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      Multiple Vulnerabilities in Konversation (Exploit)
    ------------------------------------------------------------------------

    SUMMARY

    Multiple vulnerabilities have been discovered in Konversation, an IRC
    client for KDE. One allows execution of arbitrary commands via the %
    expansion mechanism, another allows execution of arbitrary commands via
    the command line support scripts. The following two proof of concepts can
    be used to test your system for the mentioned vulnerability.

    DETAILS

    Vulnerable Systems:
     * Konversation version 0.15.0 and prior

    Immune Systems:
     * Konversation version 0.15.1 or newer

    % Expanding
    Konversation's Server::parseWildcards function contains a vulnerability
    that allows a remote attacker to utilize its expanding '%' feature to
    cause it to execute arbitrary code.

    Example:
    Utilizing the following channel name #%n/quit%n will cause a receiving an
    invitation to this channel to exit Konversation.

    Included Perl Scripts Vulnerable to Shell Command Injection
    Perl scripts included with Konversation execute a commands line similar
    to:
    exec ("dcop $PORT Konversation say $SERVER \"$TARGET\" output");
    Where the shell characters in $SERVER or $TARGET aren't escaped.

    Example:
    Therefore, joining a channel named #`kwrite` and executing the sample
    script (for example typing /uptime) will start kwrite.

    Solution:
    These problems are fixed in version 0.15.1, which was released 19/01/05
    Individual patches can be downloaded at:
     <http://wouter.coekaerts.be/files/konversation-parse.diff>
    http://wouter.coekaerts.be/files/konversation-parse.diff
     <http://wouter.coekaerts.be/files/konversation-quickconnect.diff>
    http://wouter.coekaerts.be/files/konversation-quickconnect.diff
     <http://wouter.coekaerts.be/files/konversation-scripts.diff>
    http://wouter.coekaerts.be/files/konversation-scripts.diff

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:wouter@coekaerts.be> Wouter
    Coekaerts.
    The original article can be found at:
    <http://wouter.coekaerts.be/konversation.html>
    http://wouter.coekaerts.be/konversation.html

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