SB2011080604 - Input validation error in Ruby
Published: August 6, 2011 Updated: August 11, 2020
Security Bulletin ID
SB2011080604
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2011-2705)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
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.
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/4579
- http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=32050
- 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/2011/07/11/1
- 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.redhat.com/support/errata/RHSA-2011-1581.html
- http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/
- http://www.ruby-lang.org/en/news/2011/07/15/ruby-1-9-2-p290-is-released/
- http://www.securityfocus.com/bid/49015
- https://bugzilla.redhat.com/show_bug.cgi?id=722415