Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Ruby | <= 1.8.7-334 |
Related Weaknesses (CWE)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.htmlPatch
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html
- http://redmine.ruby-lang.org/issues/4579
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=32050Patch
- http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog
- http://svn.ruby-lang.org/repos/ruby/tags/v1_9_2_290/ChangeLog
- http://www.openwall.com/lists/oss-security/2011/07/11/1Patch
- http://www.openwall.com/lists/oss-security/2011/07/12/14Patch
- http://www.openwall.com/lists/oss-security/2011/07/20/1Patch
- http://www.openwall.com/lists/oss-security/2011/07/20/16Patch
- http://www.redhat.com/support/errata/RHSA-2011-1581.html
- http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/Patch
- http://www.ruby-lang.org/en/news/2011/07/15/ruby-1-9-2-p290-is-released/Patch
- http://www.securityfocus.com/bid/49015
- https://bugzilla.redhat.com/show_bug.cgi?id=722415Patch
FAQ
What is CVE-2011-2705?
CVE-2011-2705 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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...
How severe is CVE-2011-2705?
CVE-2011-2705 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-2705?
Check the references section above for vendor advisories and patch information. Affected products include: Ruby-Lang Ruby.