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The final version of the CSI 6.0 has been released. 
Find out why this is not just another Patch Management solution: http://secunia.com/blog/325/

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TITLE:
Ruby Web Form Object Hash Collision Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA51253

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/51253/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=51253

RELEASE DATE:
2012-11-12

DISCUSS ADVISORY:
http://secunia.com/advisories/51253/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/51253/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=51253

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
A vulnerability has been reported in Ruby, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within a hash generation
function when hashing object by using the strings as keys. This can
be exploited to cause a hash collision resulting in high CPU
consumption via a specially crafted form sent in a HTTP POST
request.

This is related to:
SA47405

The vulnerability is reported in versions prior to 1.9.3-p327.

SOLUTION:
Update to version 1.9.3-p327.

PROVIDED AND/OR DISCOVERED BY:
Jean-Philippe Aumasson

ORIGINAL ADVISORY:
Ruby:
http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/

Jean-Philippe Aumasson:
http://2012.appsec-forum.ch/conferences/#c17

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
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http://secunia.com/vulnerability_intelligence/

EXPLOIT:
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http://secunia.com/vulnerability_intelligence/

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