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Revive Adserver Security Advisory                     REVIVE-SA-2014-002
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http://www.revive-adserver.com/security/revive-sa-2014-002
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CVE-IDs:               CVE-2014-8793, CVE-2014-8875
Date:                  2014-12-17
Risk Level:            Medium
Applications affected: Revive Adserver
Versions affected:     <= 3.0.5
Versions not affected: >= 3.0.6, >= 3.1.0
Website:               http://www.revive-adserver.com/
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Vulnerability 1 - Denial of Service
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Vulnerability Type:    XML Entity Expansion [CWE-776]
CVE-ID:                CVE-2014-8875
CVSSv2 Base Score:     5 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
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Description
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Similar vulnerabilities have been discovered and reported earlier in 
2014 for other PHP applications, i.e. Drupal and WordPress. It has been 
discovered that the Revive Adserver’s XML-RPC implementation might be 
vulnerable to the same kind of attacks.

A remote attacker can send specifically crafted payloads to the XML-RPC 
endpoints of a Revive Adserver instance in an attempt to consume the 
server resources (CPU and memory) and ultimately lead to the application 
becoming unavailable or unresponsive (denial of service).


Details
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Revive Adserver XML-RPC servers, available both in the delivery engine 
(/www/delivery/[ad]xmlrpc.php, /adxmlrpc.php) and the API endpoints 
(/www/api/v2/xmlrpc/, /www/api/v1/xmlrpc/*.php) might be vulnerable to 
certain types of XML entity expansion attacks, also depending on the 
libxml2 version available on the system.


References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8875
http://cwe.mitre.org/data/definitions/776.html
https://github.com/revive-adserver/revive-adserver/commit/0559d00
https://wordpress.org/news/2014/08/wordpress-3-9-2/
https://www.drupal.org/SA-CORE-2014-004


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Vulnerability 2 - XSS
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Vulnerability Type:    Cross-Site Scripting [CWE-79]
CVE-ID:                CVE-2014-8793
CVSSv2 Base Score:     4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Also known as:         HTB23242
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Description
-----------
A Cross-Site Scripting vulnerability was recently discovered and 
reported by High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/ ).

A remote attacker can trick logged-in user to open a specially crafted 
link and execute arbitrary HTML and script code in browser in context of 
the vulnerable website.


Details
-------
Input passed via the "refresh_page" GET parameter to 
"/www/admin/report-generate.php" script is not properly sanitised before 
being returned to the user.

Please see High-Tech Bridge's own advisory for more information.


References
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https://www.htbridge.com/advisory/HTB23242
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8793
http://cwe.mitre.org/data/definitions/79.html
https://github.com/revive-adserver/revive-adserver/commit/2be73f9



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Solution
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We strongly advise people to upgrade to the most recent 3.1.0 or 3.0.6 
versions of Revive Adserver, including those running OpenX Source or 
older versions of the application.


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Contact Information
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The security contact for Revive Adserver can be reached at:
<security AT revive-adserver DOT com>.

Please review http://www.revive-adserver.com/security/ before doing so.


-- 
Matteo Beccati
On behalf of the Revive Adserver Team
http://www.revive-adserver.com/