CVE-2011-0447

Ruby on Rails 2.1.x, 2.2.x, and 2.3.x before 2.3.11, and 3.x before 3.0.4, does not properly validate HTTP requests that contain an X-Requested-With header, which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks via forged (1) AJAX or (2) API requests that leverage combinations of browser plugins and HTTP redirects, a related issue to CVE-2011-0696.

Weakness

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Affected Software

Name	Vendor	Start Version	End Version
Rails	Rubyonrails	2.1.0 (including)	2.1.0 (including)
Rails	Rubyonrails	2.1.1 (including)	2.1.1 (including)
Rails	Rubyonrails	2.1.2 (including)	2.1.2 (including)
Rails	Rubyonrails	2.2.0 (including)	2.2.0 (including)
Rails	Rubyonrails	2.2.1 (including)	2.2.1 (including)
Rails	Rubyonrails	2.2.2 (including)	2.2.2 (including)
Rails	Rubyonrails	2.3.2 (including)	2.3.2 (including)
Rails	Rubyonrails	2.3.3 (including)	2.3.3 (including)
Rails	Rubyonrails	2.3.4 (including)	2.3.4 (including)
Rails	Rubyonrails	2.3.9 (including)	2.3.9 (including)
Rails	Rubyonrails	2.3.10 (including)	2.3.10 (including)
Rails	Rubyonrails	3.0.0 (including)	3.0.0 (including)
Rails	Rubyonrails	3.0.0-beta (including)	3.0.0-beta (including)
Rails	Rubyonrails	3.0.0-beta2 (including)	3.0.0-beta2 (including)
Rails	Rubyonrails	3.0.0-beta3 (including)	3.0.0-beta3 (including)
Rails	Rubyonrails	3.0.0-beta4 (including)	3.0.0-beta4 (including)
Rails	Rubyonrails	3.0.0-rc (including)	3.0.0-rc (including)
Rails	Rubyonrails	3.0.0-rc2 (including)	3.0.0-rc2 (including)
Rails	Rubyonrails	3.0.1 (including)	3.0.1 (including)
Rails	Rubyonrails	3.0.1-pre (including)	3.0.1-pre (including)
Rails	Rubyonrails	3.0.2 (including)	3.0.2 (including)
Rails	Rubyonrails	3.0.2-pre (including)	3.0.2-pre (including)
Rails	Rubyonrails	3.0.3 (including)	3.0.3 (including)
Rails	Rubyonrails	3.0.4-rc1 (including)	3.0.4-rc1 (including)
Rails	Ubuntu	dapper	*
Rails	Ubuntu	hardy	*
Rails	Ubuntu	karmic	*
Rails	Ubuntu	lucid	*
Rails	Ubuntu	maverick	*
Rails	Ubuntu	natty	*
Rails	Ubuntu	upstream	*

Potential Mitigations

Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
Use the “double-submitted cookie” method as described by Felten and Zeller:
When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]

NVD	https://nvd.nist.gov/vuln/detail/CVE-2011-0447
CWE	https://cwe.mitre.org/data/definitions/352.html

Cross-Site Request Forgery (CSRF)

Weakness

Affected Software

Potential Mitigations

References

CVE-2011-0447

Cross-Site Request Forgery (CSRF)

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References