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Category:   Application (Generic)  >   Rails Vendors:   rubyforge.org
Rails Bugs Let Remote Users Deny Service and Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1033755
SecurityTracker URL:  http://securitytracker.com/id/1033755
CVE Reference:   CVE-2015-3226, CVE-2015-3227   (Links to External Site)
Date:  Oct 7 2015
Impact:   Denial of service via network, Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 3.2.22, 4.1.11, 4.2.2
Description:   Two vulnerabilities were reported in Rails. A remote user can cause denial of service conditions on the target system. A remote user can conduct cross-site scripting attacks.

The ActiveSupport::JSON.encode() method does not properly filter HTML code from user-supplied input before displaying the input [CVE-2015-3226]. A remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Rails 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. Version 4.0.x is not affected.

Francois Chagnon of Shopify reported this vulnerability.

A remote user send a specially crafted XML document to trigger an XML processing flaw in Active Support in applications that use REXML or JDOM and cause denial of service conditions on the target system [CVE-2015-3227].

Tomek Rabczak from the NCC Group and Matthew Draper reported this vulnerability.

Impact:   A local user can cause denial of service conditions on applications on the target system.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Rails 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.

Solution:   The vendor has issued a fix (3.2.22, 4.1.11, 4.2.2) [in June 2015].

The vendor's advisories are available at:

https://groups.google.com/forum/#!msg/rubyonrails-security/7VlB_pck3hU/3QZrGIaQW6cJ
https://groups.google.com/forum/#!msg/rubyonrails-security/bahr2JLnxvk/x4EocXnHPp8J

Vendor URL:  weblog.rubyonrails.org/2015/6/16/Rails-3-2-22-4-1-11-and-4-2-2-have-been-released-and-more/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 8 2015 (IBM Issues Fix for IBM License Metric Tool) Rails Bugs Let Remote Users Deny Service and Conduct Cross-Site Scripting Attacks
IBM has issued a fix for IBM License Metric Tool.



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