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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.80% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2011/07/12/14 mailing list patch
http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/ patch
https://bugzilla.redhat.com/show_bug.cgi?id=722415 patch
http://www.openwall.com/lists/oss-security/2011/07/20/16 mailing list patch
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 patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html patch vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/69032 vdb entry
http://www.openwall.com/lists/oss-security/2011/07/20/1 mailing list patch
http://www.openwall.com/lists/oss-security/2011/07/11/1 mailing list patch
http://www.securityfocus.com/bid/49015 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2011-2686?
CVE-2011-2686 has been scored as a medium severity vulnerability.
How to fix CVE-2011-2686?
To fix CVE-2011-2686, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-2686 being actively exploited in the wild?
It is possible that CVE-2011-2686 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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