CVE-2011-2705

Description

The SecureRandom.random_bytes function in lib/securerandom.rb in Ruby before 1.8.7-p352 and 1.9.x before 1.9.2-p290 relies on PID values for initialization, which makes it easier for context-dependent attackers to predict the result string by leveraging knowledge of random strings obtained in an earlier process with the same PID.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.22% Top 25%
Vendor Advisory redhat.com 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://www.redhat.com/support/errata/RHSA-2011-1581.html vendor advisory
http://www.ruby-lang.org/en/news/2011/07/15/ruby-1-9-2-p290-is-released/ patch
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=32050 patch
http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html patch vendor advisory
http://svn.ruby-lang.org/repos/ruby/tags/v1_9_2_290/ChangeLog
http://www.openwall.com/lists/oss-security/2011/07/20/1 mailing list patch
http://redmine.ruby-lang.org/issues/4579
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 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2011-2705?
CVE-2011-2705 has been scored as a medium severity vulnerability.
How to fix CVE-2011-2705?
To fix CVE-2011-2705, 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-2011-2705 being actively exploited in the wild?
It is possible that CVE-2011-2705 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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