medium
5
CWE
310
Advisory Published
CVE Published
Updated

CVE-2011-2686

First published: Fri Jul 15 2011(Updated: )

It was found that Ruby did not properly reinitialize the random number generator, when forking new Ruby process. A local attacker could use this flaw to easier predict random numbers. References: [1] <a href="https://bugzilla.novell.com/show_bug.cgi?id=704409">https://bugzilla.novell.com/show_bug.cgi?id=704409</a> [2] <a href="http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/">http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/</a> [3] <a href="http://redmine.ruby-lang.org/issues/4579">http://redmine.ruby-lang.org/issues/4579</a> [4] <a href="http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&amp;revision=31713">http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&amp;revision=31713</a> [5] <a href="http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&amp;revision=32050">http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&amp;revision=32050</a> [6] <a href="http://www.openwall.com/lists/oss-security/2011/07/11/1">http://www.openwall.com/lists/oss-security/2011/07/11/1</a> [7] <a href="http://www.openwall.com/lists/oss-security/2011/07/12/14">http://www.openwall.com/lists/oss-security/2011/07/12/14</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Ruby=1.8.7-302
Ruby=1.8.7-249
Ruby=1.8.7-299
Ruby<=1.8.7-334
Ruby=1.8.7-p71
Ruby=1.8.7-p22
Ruby=1.8.7-330
Ruby=1.8.7-160
Ruby=1.8.7-173
Ruby=1.8.7-p21
Ruby=1.8.7-p72
Ruby=1.8.7-248

Remedy

http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html

Remedy

http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html

Remedy

http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=31713

Remedy

http://www.openwall.com/lists/oss-security/2011/07/11/1

Remedy

http://www.openwall.com/lists/oss-security/2011/07/12/14

Remedy

http://www.openwall.com/lists/oss-security/2011/07/20/1

Remedy

http://www.openwall.com/lists/oss-security/2011/07/20/16

Remedy

http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=722415

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-2686?

    CVE-2011-2686 has been rated as a medium severity vulnerability due to its potential to allow local attackers to predict random numbers.

  • How do I fix CVE-2011-2686?

    To fix CVE-2011-2686, users should update Ruby to a version that is not affected, specifically any version above 1.8.7-334.

  • What software versions are affected by CVE-2011-2686?

    CVE-2011-2686 affects several versions of Ruby 1.8.7, including versions 1.8.7-160 through 1.8.7-334 inclusive.

  • Who can exploit CVE-2011-2686?

    CVE-2011-2686 can be exploited by local attackers who can execute code in a Ruby environment.

  • What type of vulnerability is CVE-2011-2686 classified as?

    CVE-2011-2686 is classified as a local information disclosure vulnerability.

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