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SEC Consult Vulnerability Lab Security Advisory < 20140828-0 >
=======================================================================
              title: Reflected Cross-Site Scripting
            product: F5 BIG-IP
 vulnerable version: <= 11.5.1
      fixed version: > 11.6.0
             impact: Medium
         CVE number: CVE-2014-4023
           homepage: https://f5.com/
              found: 2014-07-07
                 by: Stefan Viehböck
                     SEC Consult Vulnerability Lab
                     https://www.sec-consult.com
=======================================================================

Vendor/product description:
- -----------------------------
"The BIG-IP product suite is a system of application delivery services that
work together on the same best-in-class hardware platform or software virtual
instance.  From load balancing and service offloading to acceleration and
security, the BIG-IP system delivers agility—and ensures your applications
are fast, secure, and available."

URL: https://f5.com/products/big-ip


Vulnerability overview/description:
- -----------------------------------
BIG-IP suffers from a reflected Cross-Site Scripting vulnerability,
which allow an attacker to steal other users sessions, to impersonate other
users and to gain unauthorized access to the admin interface.


Proof of concept:
- -----------------
The following HTTP request triggers the vulnerability:

POST /tmui/dashboard/echo.jsp HTTP/1.1
Host: BIGIP
Cookie: BIGIPAuthCookie=*VALID_COOKIE*
Content-Length: 29

<script>alert('xss')</script>

The server does not properly encode user supplied information and returns it
to the user resulting in Cross-Site Scripting.


Vulnerable / tested versions:
- -----------------------------
More information can be found at:
https://support.f5.com/kb/en-us/solutions/public/15000/500/sol15532.html


Vendor contact timeline:
- ------------------------
2014-07-08: Sending advisory and proof of concept exploit via encrypted
            channel.
2014-07-09: Vendor confirms receipt of advisory. States that fix will be
            released in the "next 6 weeks or so"
2014-07-24: Vendor provides CVE: CVE-2014-4023
2014-08-26: Vendor releases fixed version.
2014-08-28: SEC Consult releases a coordinated security advisory.


Solution:
- ---------
Update to the newest version.

More information can be found at:
https://support.f5.com/kb/en-us/solutions/public/15000/500/sol15532.html


Workaround:
- -----------
No workaround available.


Advisory URL:
- -------------
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SEC Consult Vulnerability Lab

SEC Consult
Vienna - Bangkok - Frankfurt/Main - Montreal - Singapore - Vilnius

Headquarter:
Mooslackengasse 17, 1190 Vienna, Austria
Phone:   +43 1 8903043 0
Fax:     +43 1 8903043 15

Mail: research at sec-consult dot com
Web: https://www.sec-consult.com
Blog: http://blog.sec-consult.com
Twitter: https://twitter.com/sec_consult

Interested in working with the experts of SEC Consult?
Write to career@sec-consult.com

EOF Stefan Viehböck / @2014
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