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Ubuntu 18.04 LTS : Smarty vulnerabilities (USN-5348-1)

critical Nessus Plugin ID 159268

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 18.04 LTS / 21.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5348-1 advisory.

 - Smarty_Security::isTrustedResourceDir() in Smarty before 3.1.33 is prone to a path traversal vulnerability due to insufficient template code sanitization. This allows attackers controlling the executed template code to bypass the trusted directory security restriction and read arbitrary files. (CVE-2018-13982)

 - Smarty before 3.1.33-dev-4 allows attackers to bypass the trusted_dir protection mechanism via a file:./../ substring in an include statement. (CVE-2018-16831)

 - Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.43 and 4.0.3, template authors could run restricted static php methods. Users should upgrade to version 3.1.43 or 4.0.3 to receive a patch. (CVE-2021-21408)

 - Smarty before 3.1.39 allows a Sandbox Escape because $smarty.template_object can be accessed in sandbox mode. (CVE-2021-26119)

 - Smarty before 3.1.39 allows code injection via an unexpected function name after a {function name= substring. (CVE-2021-26120)

 - Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.42 and 4.0.2, template authors could run arbitrary PHP code by crafting a malicious math string. If a math string was passed through as user provided data to the math function, external users could run arbitrary PHP code by crafting a malicious math string. Users should upgrade to version 3.1.42 or 4.0.2 to receive a patch. (CVE-2021-29454)

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

Solution

Update the affected smarty3 package.

See Also

https://ubuntu.com/security/notices/USN-5348-1

Plugin Details

Severity: Critical

ID: 159268

File Name: ubuntu_USN-5348-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 3/28/2022

Updated: 10/16/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2021-26120

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:smarty3

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: 3/28/2022

Vulnerability Publication Date: 9/11/2018

Reference Information

CVE: CVE-2018-13982, CVE-2018-16831, CVE-2021-21408, CVE-2021-26119, CVE-2021-26120, CVE-2021-29454

USN: 5348-1