National Cyber Awareness System
Vulnerability Summary for CVE-2011-4838
Original release date:12/30/2011
Last revised:04/05/2013
Source:
US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
References to Advisories, Solutions, and Tools
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US-CERT Vulnerability Note: VU#903934
Name: VU#903934
External Source: XF
Name: jruby-hash-dos(72019)
External Source: MISC
Name: http://www.ocert.org/advisories/ocert-2011-003.html
External Source: MISC
Name: http://www.nruns.com/_downloads/advisory28122011.pdf
External Source: GENTOO
Name: GLSA-201207-06
External Source: SECUNIA
Name: 50084
External Source: SECUNIA
Name: 47407
External Source: REDHAT
Name: RHSA-2012:1232
External Source: CONFIRM
Name: http://jruby.org/2011/12/27/jruby-1-6-5-1.html
External Source: BUGTRAQ
Name: 20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table
