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Amazon Linux 2 : ruby (ALAS-2024-2534)

medium Nessus Plugin ID 194868

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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 2.0.0.648-36. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2534 advisory.

 An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port.
 This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions). (CVE-2021-31810)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update ruby' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2024-2534.html

https://alas.aws.amazon.com/cve/html/CVE-2021-31810.html

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

Plugin Details

Severity: Medium

ID: 194868

File Name: al2_ALAS-2024-2534.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/30/2024

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 2.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2021-31810

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:ruby-doc, p-cpe:/a:amazon:linux:ruby-tcltk, p-cpe:/a:amazon:linux:ruby-irb, p-cpe:/a:amazon:linux:rubygem-rake, p-cpe:/a:amazon:linux:rubygem-psych, p-cpe:/a:amazon:linux:ruby-devel, p-cpe:/a:amazon:linux:ruby-libs, p-cpe:/a:amazon:linux:ruby, p-cpe:/a:amazon:linux:rubygem-json, p-cpe:/a:amazon:linux:rubygems, p-cpe:/a:amazon:linux:rubygem-bigdecimal, p-cpe:/a:amazon:linux:rubygems-devel, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:rubygem-minitest, p-cpe:/a:amazon:linux:rubygem-io-console, p-cpe:/a:amazon:linux:ruby-debuginfo, p-cpe:/a:amazon:linux:rubygem-rdoc

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: 4/24/2024

Vulnerability Publication Date: 7/13/2021

Reference Information

CVE: CVE-2021-31810