Smarty up to 3.1.42/4.0.2 Template code injection

Summaryinfo

A vulnerability classified as critical has been found in Smarty up to 3.1.42/4.0.2. Affected by this issue is some unknown functionality of the component Template Handler. Performing a manipulation results in code injection. This vulnerability was named CVE-2021-21408. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Smarty up to 3.1.42/4.0.2 (Customer Relationship Management System). This affects some unknown processing of the component Template Handler. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 01/11/2022 as GHSA-4h9c-v5vg-5m6m. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2021-21408 since 12/22/2020. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 211188 (Fedora 37 : php-Smarty (2022-d5fc9dcdd7)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.1.43 or 4.0.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 19ae410bf56007a5ef24441cdc6414619cfaf664 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (211188) and EUVD (EUVD-2022-0443). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Customer Relationship Management System

Name

• Smarty

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.1.5
• 3.1.6
• 3.1.7
• 3.1.8
• 3.1.9
• 3.1.10
• 3.1.11
• 3.1.12
• 3.1.13
• 3.1.14
• 3.1.15
• 3.1.16
• 3.1.17
• 3.1.18
• 3.1.19
• 3.1.20
• 3.1.21
• 3.1.22
• 3.1.23
• 3.1.24
• 3.1.25
• 3.1.26
• 3.1.27
• 3.1.28
• 3.1.29
• 3.1.30
• 3.1.31
• 3.1.32
• 3.1.33
• 3.1.34
• 3.1.35
• 3.1.36
• 3.1.37
• 3.1.38
• 3.1.39
• 3.1.40
• 3.1.41
• 3.1.42
• 4.0.0
• 4.0.1
• 4.0.2

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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