Cryptographic issues in Ruby - CVE-2011-2686
Published: August 6, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44830
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2011-2686
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Ruby
Affected software:
Ruby
Ruby
Detailed vulnerability description
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.
How to mitigate CVE-2011-2686
Install update from vendor's website.
Sources
- 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