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Amazon Linux 2 : ruby (ALASRUBY2.6-2023-002)

high Nessus Plugin ID 181951

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of ruby installed on the remote host is prior to 2.6.9-129. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2RUBY2.6-2023-002 advisory.

 A flaw was found in ruby, where the date object was found to be vulnerable to a regular expression denial of service (ReDoS) during the parsing of dates. This flaw allows an attacker to hang a ruby application by providing a specially crafted date string. The highest threat to this vulnerability is system availability. (CVE-2021-41817)

 CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby. (CVE-2021-41819)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'yum update ruby' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALASRUBY2.6-2023-002.html

https://alas.aws.amazon.com/cve/html/CVE-2021-41817.html

https://alas.aws.amazon.com/cve/html/CVE-2021-41819.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: High

ID: 181951

File Name: al2_ALASRUBY2_6-2023-002.nasl

Version: 1.2

Type: local

Agent: unix

Published: 9/27/2023

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2021-41819

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:ruby-devel, p-cpe:/a:amazon:linux:rubygem-xmlrpc, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:rubygem-net-telnet, p-cpe:/a:amazon:linux:rubygem-irb, p-cpe:/a:amazon:linux:rubygem-test-unit, p-cpe:/a:amazon:linux:ruby-libs, p-cpe:/a:amazon:linux:rubygems, p-cpe:/a:amazon:linux:rubygems-devel, p-cpe:/a:amazon:linux:ruby-debuginfo, p-cpe:/a:amazon:linux:rubygem-rake, p-cpe:/a:amazon:linux:rubygem-psych, p-cpe:/a:amazon:linux:rubygem-bigdecimal, p-cpe:/a:amazon:linux:rubygem-power_assert, p-cpe:/a:amazon:linux:rubygem-minitest, p-cpe:/a:amazon:linux:rubygem-io-console, p-cpe:/a:amazon:linux:rubygem-bundler, p-cpe:/a:amazon:linux:rubygem-rdoc, p-cpe:/a:amazon:linux:ruby-doc, p-cpe:/a:amazon:linux:rubygem-did_you_mean, p-cpe:/a:amazon:linux:rubygem-json, p-cpe:/a:amazon:linux:ruby, p-cpe:/a:amazon:linux:rubygem-openssl

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/7/2023

Vulnerability Publication Date: 1/1/2022

Reference Information

CVE: CVE-2021-41817, CVE-2021-41819