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Ubuntu 20.04 LTS : Ruby vulnerability (USN-5806-3)

high Nessus Plugin ID 173050

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5806-3 advisory.

 - The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object. (CVE-2021-33621)

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

Solution

Update the affected libruby2.7, ruby2.7 and / or ruby2.7-dev packages.

See Also

https://ubuntu.com/security/notices/USN-5806-3

Plugin Details

Severity: High

ID: 173050

File Name: ubuntu_USN-5806-3.nasl

Version: 1.2

Type: local

Agent: unix

Published: 3/21/2023

Updated: 10/20/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7

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

CVSS Score Source: CVE-2021-33621

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libruby2.7, p-cpe:/a:canonical:ubuntu_linux:ruby2.7, p-cpe:/a:canonical:ubuntu_linux:ruby2.7-dev

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/20/2023

Vulnerability Publication Date: 11/18/2022

Reference Information

CVE: CVE-2021-33621

USN: 5806-3