Test ID:	1.3.6.1.4.1.25623.1.0.881191
Category:	CentOS Local Security Checks
Title:	CentOS Update for irb CESA-2012:0070 centos4
Summary:	The remote host is missing an update for the 'irb'; package(s) announced via the referenced advisory.
Description:	Summary: The remote host is missing an update for the 'irb' package(s) announced via the referenced advisory. Vulnerability Insight: Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. A denial of service flaw was found in the implementation of associative arrays (hashes) in Ruby. An attacker able to supply a large number of inputs to a Ruby application (such as HTTP POST request parameters sent to a web application) that are used as keys when inserting data into an array could trigger multiple hash function collisions, making array operations take an excessive amount of CPU time. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2011-4815) It was found that Ruby did not reinitialize the PRNG (pseudorandom number generator) after forking a child process. This could eventually lead to the PRNG returning the same result twice. An attacker keeping track of the values returned by one child process could use this flaw to predict the values the PRNG would return in other child processes (as long as the parent process persisted). (CVE-2011-3009) Red Hat would like to thank oCERT for reporting CVE-2011-4815. oCERT acknowledges Julian Wälde and Alexander Klink as the original reporters of CVE-2011-4815. All users of ruby are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. Affected Software/OS: irb on CentOS 4 Solution: Please install the updated packages. CVSS Score: 7.8 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2011-3009 BugTraq ID: 49126 http://www.securityfocus.com/bid/49126 http://redmine.ruby-lang.org/issues/show/4338 http://www.openwall.com/lists/oss-security/2011/07/20/1 http://www.redhat.com/support/errata/RHSA-2011-1581.html RedHat Security Advisories: RHSA-2012:0070 http://rhn.redhat.com/errata/RHSA-2012-0070.html XForce ISS Database: ruby-random-number-weak-security(69157) https://exchange.xforce.ibmcloud.com/vulnerabilities/69157 Common Vulnerability Exposure (CVE) ID: CVE-2011-4815 http://lists.apple.com/archives/security-announce/2012/May/msg00001.html Bugtraq: 20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table (Google Search) http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html CERT/CC vulnerability note: VU#903934 http://www.kb.cert.org/vuls/id/903934 http://jvn.jp/en/jp/JVN90615481/index.html http://jvndb.jvn.jp/ja/contents/2012/JVNDB-2012-000066.html http://www.nruns.com/_downloads/advisory28122011.pdf http://www.ocert.org/advisories/ocert-2011-003.html http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/391606 RedHat Security Advisories: RHSA-2012:0069 http://rhn.redhat.com/errata/RHSA-2012-0069.html http://www.securitytracker.com/id?1026474 http://secunia.com/advisories/47405 http://secunia.com/advisories/47822 XForce ISS Database: ruby-hash-dos(72020) https://exchange.xforce.ibmcloud.com/vulnerabilities/72020 Common Vulnerability Exposure (CVE) ID: CVE-2011-2686 BugTraq ID: 49015 http://www.securityfocus.com/bid/49015 http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html 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/2011/07/20/16 XForce ISS Database: ruby-random-number-dos(69032) https://exchange.xforce.ibmcloud.com/vulnerabilities/69032 Common Vulnerability Exposure (CVE) ID: CVE-2011-2705
Copyright	Copyright (c) 2012 Greenbone Networks GmbH

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