Ruby before 1.8.7-p352 does not reset the random seed upon...

Vulnerability 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.

References

• http://www.openwall.com/lists/oss-security/2011/07/12/14
• http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/
• https://bugzilla.redhat.com/show_bug.cgi?id=722415
• http://www.openwall.com/lists/oss-security/2011/07/20/16
• http://redmine.ruby-lang.org/issues/show/4338
• http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog
• http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=31713
• http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/69032
• http://www.openwall.com/lists/oss-security/2011/07/20/1
• http://www.openwall.com/lists/oss-security/2011/07/11/1
• http://www.securityfocus.com/bid/49015
• http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html