Permanent Cross-Site Scripting (XSS) in FreePBX 2.5.x – 2.6.0

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Permanent Cross-Site Scripting (XSS) in FreePBX 2.5.x – 2.6.0
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Advisory Name: Permanent Cross-Site Scripting (XSS) in FreePBX 2.5.x – 2.6.0
 
Internal Cybsec Advisory Id: 2010-0102
 
Vulnerability Class: Permanent Cross-Site Scripting (XSS)
 
Release Date: 15/01/2010
 
Affected Applications: Confirmed in FreePBX  2.5.x and 2.6.0 - Other
versions may also be affected
 
Affected Platforms: Any running FreePBX 2.5.x and 2.6.0
 
Local / Remote: Remote
 
Severity: Medium – CVSS: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
 
Researcher: Ivan Huertas
 
Vendor Status: Patched
 
Reference to Vulnerability Disclosure Policy:
http://www.cybsec.com/vulnerability_policy.pdf
 
Vulnerability Description:
 
A permanent Cross Site Scripting vulnerability was found in FreePBX 2.5.x
and 2.6, because the application fails to sanitize user-supplied input.
The vulnerability can be triggered by any logged-in user who is able to
add an Inbound Route.
 
Proof of Concept:
 
* Add  as a Description in an Inbound
Route.
 
Impact:
 
An affected user may unintentionally execute scripts or actions written by
an attacker. In addition, an attacker may obtain authorization cookies
that would allow him to gain unauthorized access to the application.
 
Solution:
 
Upgrade to the latest version
 
•   http://www.freepbx.org/v2/changeset/8589
•   http://www.freepbx.org/v2/changeset/8590
•   http://www.freepbx.org/v2/changeset/8591
 
 
Vendor Response:
 
2009-30-12 – Vulnerability was identified
2010-01-07 – Vendor contacted
2010-01-11 – Vendor confirmed vulnerability
2010-01-14 – Vendor released fixed version
2010-01-15 – Vulnerability published



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