Amazon Linux 2 : ruby (ALASRUBY2.6-2023-006)

high Nessus Plugin ID 182039

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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 2.6.7-126. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2RUBY2.6-2023-006 advisory.

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack. (CVE-2020-25613)

A flaw was found in the way the Ruby REXML library parsed XML documents. Parsing a specially crafted XML document using REXML and writing parsed data back to a new XML document results in creating a document with a different structure. This issue could affect the integrity of processed data in applications using REXML that parse XML documents, write data back to XML, and re-parse them again. (CVE-2021-28965)

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.

Plugin Details

Severity: High

ID: 182039

File Name: al2_ALASRUBY2_6-2023-006.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

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: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-28965

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:H/A:N

Temporal Vector: CVSS:3.0/E:U/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 Ease: No known exploits are available

Patch Publication Date: 8/21/2023

Vulnerability Publication Date: 10/6/2020

Reference Information

CVE: CVE-2020-25613, CVE-2021-28965

Detections

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