SB2011080603 - Cryptographic issues in Ruby

Description

This security bulletin contains information about 1 vulnerability.

1) Cryptographic issues (CVE-ID: CVE-2011-2686)

CWE-ID: CWE-310 - Cryptographic Issues

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

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.

Remediation

Install update from vendor's website.

References

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