Unrated severityNVD Advisory· Published Aug 5, 2011· Updated Jun 16, 2026
CVE-2011-2686
CVE-2011-2686
Description
Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900. NOTE: this issue exists because of a regression during Ruby 1.8.6 development.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
13cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*+ 11 more
- cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*range: <=1.8.7-334
- cpe:2.3:a:ruby-lang:ruby:1.8.7-160:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-173:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-248:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-249:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-299:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-302:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-330:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7-p21:*:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7:p22:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7:p71:*:*:*:*:*:*
- cpe:2.3:a:ruby-lang:ruby:1.8.7:p72:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
13- lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.htmlnvdPatch
- lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.htmlnvdPatch
- svn.ruby-lang.org/cgi-bin/viewvc.cginvdPatch
- www.openwall.com/lists/oss-security/2011/07/11/1nvdPatch
- www.openwall.com/lists/oss-security/2011/07/12/14nvdPatch
- www.openwall.com/lists/oss-security/2011/07/20/1nvdPatch
- www.openwall.com/lists/oss-security/2011/07/20/16nvdPatch
- www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/nvdPatch
- bugzilla.redhat.com/show_bug.cginvdPatch
- redmine.ruby-lang.org/issues/show/4338nvd
- svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLognvd
- www.securityfocus.com/bid/49015nvd
- exchange.xforce.ibmcloud.com/vulnerabilities/69032nvd
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