Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2011-4838

5.0 · MEDIUM

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 consumpt…

Published Dec 30, 2011jrubyCWE-400EPSS 4.20%

Overview

CVE-2011-4838 is a medium-severity vulnerability affecting jruby jruby. It was published on December 30, 2011 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from jruby. Update jruby to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
jrubyjruby>= 0, < 1.6.5.1Affected

References

Refarchives.neohapsis.com/archives/bugtraq/2011-12/0181.htmlRefjruby.org/2011/12/27/jruby-1-6-5-1.htmlRefrhn.redhat.com/errata/RHSA-2012-1232.htmlRefsecunia.com/advisories/47407Refsecunia.com/advisories/50084Refsecurity.gentoo.org/glsa/glsa-201207-06.xmlRefwww.kb.cert.org/vuls/id/903934Refwww.nruns.com/_downloads/advisory28122011.pdfRefwww.ocert.org/advisories/ocert-2011-003.htmlRefexchange.xforce.ibmcloud.com/vulnerabilities/72019

How CyberStrike helps

Frequently asked questions

What is CVE-2011-4838?

CVE-2011-4838 is a medium-severity vulnerability affecting jruby jruby. It was published on December 30, 2011 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2011-4838?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-4838?

Check the references section for vendor advisories and patches from jruby. Update jruby to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-4838?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-4838 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2011

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999