[UNIX] Remote Command Execution Vulnerability In oMail

From: SecuriTeam (support_at_securiteam.com)
Date: 05/09/04

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    To: list@securiteam.com
    Date: 9 May 2004 19:35:37 +0200
    
    

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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      Remote Command Execution Vulnerability In oMail
    ------------------------------------------------------------------------

    SUMMARY

     <http://webmail.omnis.ch/omail.pl?action=about> oMail-webmail is "a
    Webmail solution for mail server based on qmail and optionally vmailmgr or
    vpopmail". A vulnerability in oMail-webmail allows a remote user to run
    arbitrary code on the server.

    DETAILS

    Vulnerable Systems:
     * oMail-webmail version 0.98.5

    The regular expression used to filter out " and ' doesn't help prevent
    executing code using other meta-characters, both back ticks and more
    arcane ways of shell expansion $(rm -rf /) are still possible.

    Patch:
    Fix this vulnerability by replacing the regular expression around line 411
    in omail.pl to something like: $password = quotemeta($password);

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:thijs@dalhuijsen.com> Thijs
    Dalhuijsen.

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