Vulnerability CVE-2011-4838
Published: 2011-12-29   Modified: 2012-02-13

Description:
JRuby before 1.6.5.1 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Jruby -> Jruby 

 References:
http://www.kb.cert.org/vuls/id/903934
http://xforce.iss.net/xforce/xfdb/72019
http://www.ocert.org/advisories/ocert-2011-003.html
http://www.nruns.com/_downloads/advisory28122011.pdf
http://security.gentoo.org/glsa/glsa-201207-06.xml
http://secunia.com/advisories/50084
http://secunia.com/advisories/47407
http://rhn.redhat.com/errata/RHSA-2012-1232.html
http://jruby.org/2011/12/27/jruby-1-6-5-1.html
http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
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