CentOS Update for irb CESA-2012:0070 centos4

Published: 2012-07-30 11:09:50
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Summary:
The remote host is missing an update for the 'irb' Linux Distribution Package(s) announced via the referenced advisory.

Affected Versions:
irb on CentOS 4

Recommendations:
Please install the updated Linux Distribution Packages.

Technical Details:
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 Linux Distribution Packages, which contain backported patches to resolve these issues.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2011-3009
https://nvd.nist.gov/vuln/detail/CVE-2011-4815
https://nvd.nist.gov/vuln/detail/CVE-2011-2686
https://nvd.nist.gov/vuln/detail/CVE-2011-2705

References:

http://lists.centos.org/pipermail/centos-announce/2012-January/018401.html

Severity
High
CVSS Score
7.8
Published
2012-07-30
Modified
2019-03-15
Category
CentOS Local Security Checks

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