PHP code injection in Smarty

1) Code Injection

EUVDB-ID: #VU89862

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-35226

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary PHP code on the target system.

The vulnerability exists due to improper input validation when handling "extends-tag" attribute. Template authors can inject and execute arbitrary PHP code by choosing a malicious file name for an extends-tag.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Smarty: 3.0.0 - 5.1.0

CPE2.3

• cpe:2.3:a:smarty_php_net:smarty:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.1:*:*:*:*:*:*:*
• cpe:2.3:a:smarty_php_net:smarty:3.1.0:*:*:*:*:*:*:*

External links

https://github.com/smarty-php/smarty/security/advisories/GHSA-4rmg-292m-wg3w
https://github.com/smarty-php/smarty/commit/0be92bc8a6fb83e6e0d883946f7e7c09ba4e857a

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.