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Category:   Application (Security)  >   Tenable Nessus Vendors:   Deraison, Renaud et al
Nessus Web Server Input Validation Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1024248
SecurityTracker URL:  http://securitytracker.com/id/1024248
CVE Reference:   CVE-2010-2914   (Links to External Site)
Updated:  Aug 5 2010
Original Entry Date:  Jul 27 2010
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): web server prior to 1.2.6
Description:   Two vulnerabilities were reported in the Nessus Web Server. A remote user can conduct cross-site scripting attacks. A remote user can determine the version number.

The web server (nessusd_www_server.nbin) does not properly filter HTML code from user-supplied input before displaying the input. A remote user can create a specially crafted URL that, when loaded by a target operator, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Nessus software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Emmanuel Bouillon from the NATO C3 Agency reported this vulnerability.

A remote user can request the /feed method to determine the version number of nessusd.

Jason Jones from Inner Security reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Nessus software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user can determine the nessusd version number.

Solution:   The vendor has issued a fix (web server version 1.2.6).

The vendor's advisory is available at:

https://discussions.nessus.org/message/7245#7245

Vendor URL:  www.nessus.org/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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