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Amazon Linux AMI : ruby20 (ALAS-2020-1416)

high Nessus Plugin ID 139550

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Synopsis

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

Description

The version of ruby20 installed on the remote host is prior to 2.0.0.648-1.33. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1416 advisory.

 An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.
 (CVE-2018-16396)

 The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object Creation Vulnerability. This is quite similar toCVE-2013-0269, but does not rely on poor garbage-collection behavior within Ruby. Specifically, use of JSON parsing methods can lead to creation of a malicious object within the interpreter, with adverse effects that are application- dependent. (CVE-2020-10663)

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 ruby20' to update your system.

See Also

https://access.redhat.com/security/cve/CVE-2018-16396

https://access.redhat.com/security/cve/CVE-2020-10663

https://alas.aws.amazon.com/ALAS-2020-1416.html

Plugin Details

Severity: High

ID: 139550

File Name: ala_ALAS-2020-1416.nasl

Version: 1.5

Type: local

Agent: unix

Published: 8/13/2020

Updated: 2/21/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2018-16396

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:ruby20-libs, p-cpe:/a:amazon:linux:rubygem20-bigdecimal, p-cpe:/a:amazon:linux:rubygem20-psych, p-cpe:/a:amazon:linux:rubygems20, p-cpe:/a:amazon:linux:rubygem20-io-console, p-cpe:/a:amazon:linux:ruby20, p-cpe:/a:amazon:linux:ruby20-debuginfo, p-cpe:/a:amazon:linux:ruby20-irb, p-cpe:/a:amazon:linux:ruby20-doc, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:ruby20-devel, p-cpe:/a:amazon:linux:rubygems20-devel

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/12/2020

Vulnerability Publication Date: 11/16/2018

Reference Information

CVE: CVE-2018-16396, CVE-2020-10663

ALAS: 2020-1416