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CentOS Update for ruby CESA-2012:0070 centos5
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'ruby' package(s) announced via the referenced advisory.
Insight
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
Affected Software
ruby on CentOS 5
Solution
Solution
Please install the updated packages.