CVE-2011-4838
First published: Wed Dec 28 2011(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Rubygems | <1.6.5.1 |
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Reference Links
- http://www.ocert.org/advisories/ocert-2011-003.html
- http://www.kb.cert.org/vuls/id/903934
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://secunia.com/advisories/47407
- http://jruby.org/2011/12/27/jruby-1-6-5-1.html
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
- http://rhn.redhat.com/errata/RHSA-2012-1232.html
- http://secunia.com/advisories/50084
- http://security.gentoo.org/glsa/glsa-201207-06.xml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/72019
- https://www.cve.org/CVERecord?id=CVE-2011-4838 https://nvd.nist.gov/vuln/detail/CVE-2011-4838
- https://bugzilla.redhat.com/show_bug.cgi?id=770820
- https://access.redhat.com/errata/RHSA-2012:1125
- https://access.redhat.com/security/cve/CVE-2011-4838
- http://www.cs.rice.edu/~scrosby/hash/CrosbyWallach_UsenixSec2003.pdf
- http://www.jruby.org/2011/12/27/jruby-1-6-5-1.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=770821
- https://issues.jboss.org/browse/JBESB-3725
- https://issues.jboss.org/browse/SOA-3680
- https://rhn.redhat.com/errata/RHSA-2012-1125.html
- https://github.com/jruby/jruby/commit/f007944b459e7c5e33b8296433d8b9d704bf02cc
Frequently Asked Questions
What is the severity of CVE-2011-4838?
CVE-2011-4838 has a severity rating that indicates it can lead to denial of service due to hash collision attacks.
How do I fix CVE-2011-4838?
To fix CVE-2011-4838, upgrade JRuby to version 1.6.5.1 or later.
What are the implications of CVE-2011-4838 for my application?
CVE-2011-4838 may allow attackers to consume CPU resources, causing performance issues or downtime for applications using JRuby.
Which versions of JRuby are affected by CVE-2011-4838?
CVE-2011-4838 affects all versions of JRuby prior to 1.6.5.1.
Can I identify if my application is vulnerable to CVE-2011-4838?
You can identify vulnerability to CVE-2011-4838 by checking the JRuby version in use and reviewing application input handling for hash tables.
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