RHEL 6 : ruby (RHSA-2012:0069)

high Nessus Plugin ID 57746

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Synopsis

The remote Red Hat host is missing a security update for ruby.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2012:0069 advisory.

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)

Red Hat would like to thank oCERT for reporting this issue. oCERT acknowledges Julian Wlde and Alexander Klink as the original reporters.

All users of ruby are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL ruby package based on the guidance in RHSA-2012:0069.

Plugin Details

Severity: High

ID: 57746

File Name: redhat-RHSA-2012-0069.nasl

Version: 1.23

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 1/31/2012

Updated: 3/24/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2011-4815

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:ruby-irb, p-cpe:/a:redhat:enterprise_linux:ruby-libs, p-cpe:/a:redhat:enterprise_linux:ruby-static, p-cpe:/a:redhat:enterprise_linux:ruby-docs, p-cpe:/a:redhat:enterprise_linux:ruby-tcltk, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:ruby-ri, p-cpe:/a:redhat:enterprise_linux:ruby, p-cpe:/a:redhat:enterprise_linux:ruby-devel, p-cpe:/a:redhat:enterprise_linux:ruby-rdoc

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 1/30/2012

Vulnerability Publication Date: 12/30/2011

Reference Information

CVE: CVE-2011-4815

BID: 51198

RHSA: 2012:0069

Detections

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