[UNIX] Happymall E-Commerce Input Validation Flaw Lets Remote Users Execute Arbitrary Commands

From: SecuriTeam (support_at_securiteam.com)
Date: 05/12/03

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    Date: 12 May 2003 13:22:35 +0200
    
    

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      Happymall E-Commerce Input Validation Flaw Lets Remote Users Execute
    Arbitrary Commands
    ------------------------------------------------------------------------

    SUMMARY

    Revin Aldi reported an input validation vulnerability in the Happymall
    e-commerce software. Two scripts allow remote users to execute arbitrary
    commands with the privileges of the web server.

    DETAILS

    Vulnerable systems:
     * Happymall E-Commerce versions 4.3, and 4.4

    The 'normal_html.cgi' script does not filter user-supplied input before
    making an open() call based on that input. A remote user can create a
    specially crafted URL to cause the system to execute arbitrary operating
    system commands.

    A demonstration exploit is provided:
    /shop/normal_html.cgi?file=|id|
    /shop/normal_html.cgi? file=;id|

    The vendor reports that the 'member_html.cgi' script is also affected.

    The following is a timeline of events relevant to this vulnerability:
    Apr 26, 2003 Reported to SecurityTracker
    Apr 27, 2003 Vendor contacted (via English language e-mail, without
    response)
    Apr 29, 2003 CERTCC-KR initially contacted
    May 2, 2003 Details of vulnerability provided to vendor
    May 3, 2003 CERTCC-KR Advisory published

    Thanks to Revin Aldi for discovering and reporting the flaw, to CERTCC-KR
    for coordinating with the vendor, and to the vendor for quickly
    responding.

    Impact:
    A remote user can execute arbitrary shell commands with the privileges of
    the target web server.

    Solution:
    The vendor has issued a patch, available at:
     <http://happymall.happycgi.com/forum/forum_detail.cgi?thread=353>
    http://happymall.happycgi.com/forum/forum_detail.cgi?thread=353

    The vendor has provided the following instructions for applying the patch
    to your system:
    1. Extract zip file downloaded and you will get two files, member_html.cgi
    and normal_html.cgi.
    2. Upload those files with ASCII mode to the web server in the directory
    containing index.cgi and overwrite.
    3. Change the linked address

    For example;
    Before patch applied :
    http://test6.happycgi.com/normal_html.cgi?file=company.html
    After patch applied :
    http://test6.happycgi.com/normal_html.cgi?file=company

    ADDITIONAL INFORMATION

    The vulnerability has been discovered by <mailto:reVn@minangCrew.Web.Ma>
    Revin Aldi.

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