Detections
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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.

 - Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS (regular expression Denial of Service) via a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1. (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)

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: 1.1

Type: local

Agent: unix

Published: 9/27/2023

Updated: 9/28/2023

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

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