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TITLE:
JRuby Web Form Hash Collision Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA47407

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47407/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47407

RELEASE DATE:
2011-12-29

DISCUSS ADVISORY:
http://secunia.com/advisories/47407/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Impact
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 * CVE Reference(s)

http://secunia.com/advisories/47407/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=47407

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
A vulnerability has been reported in JRuby, 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 form posts and updating a hash table. 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.

The vulnerability is reported in versions prior to 1.6.5.1.

SOLUTION:
Update to version 1.6.5.1.

PROVIDED AND/OR DISCOVERED BY:
Alexander Klink, n.runs AG and Julian Wälde, Technische Universität
Darmstadt

ORIGINAL ADVISORY:
JRuby:
http://jruby.org/2011/12/27/jruby-1-6-5-1.html

n.runs (SA-2011.004):
http://www.nruns.com/_downloads/advisory28122011.pdf

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

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

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About:
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