PHP up to 8.1.28/8.2.19/8.3.7 on Windows Unicode Character argument injection

Summaryinfo

A vulnerability classified as critical has been found in PHP up to 8.1.28/8.2.19/8.3.7 on Windows. This affects an unknown part of the component Unicode Character Handler. This manipulation causes argument injection. This vulnerability is handled as CVE-2024-4577. The attack can be initiated remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in PHP up to 8.1.28/8.2.19/8.3.7 on Windows and classified as critical. Affected by this vulnerability is some unknown processing of the component Unicode Character Handler. The manipulation with an unknown input leads to a argument injection vulnerability. The CWE definition for the vulnerability is CWE-88. The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In PHP versions 8.1.* before 8.1.29, 8.2.* before 8.2.20, 8.3.* before 8.3.8, when using Apache and PHP-CGI on Windows, if the system is set up to use certain code pages, Windows may use "Best-Fit" behavior to replace characters in command line given to Win32 API functions. PHP CGI module may misinterpret those characters as PHP options, which may allow a malicious user to pass options to PHP binary being run, and thus reveal the source code of scripts, run arbitrary PHP code on the server, etc.

It is possible to read the advisory at devco.re. This vulnerability is known as CVE-2024-4577. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

It is possible to download the exploit at packetstormsecurity.com. It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 207822 (PHP 8.2.x < 8.2.24 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 06/12/2024 with a due date of 07/03/2024:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Upgrading to version 8.1.29, 8.2.20 or 8.3.8 eliminates this vulnerability. The upgrade is hosted for download at php.net.

The vulnerability is also documented in the databases at Exploit-DB (52331) and Tenable (207822). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Programming Language Software

Name

• PHP

Version

• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.1.4
• 8.1.5
• 8.1.6
• 8.1.7
• 8.1.8
• 8.1.9
• 8.1.10
• 8.1.11
• 8.1.12
• 8.1.13
• 8.1.14
• 8.1.15
• 8.1.16
• 8.1.17
• 8.1.18
• 8.1.19
• 8.1.20
• 8.1.21
• 8.1.22
• 8.1.23
• 8.1.24
• 8.1.25
• 8.1.26
• 8.1.27
• 8.1.28
• 8.2.0
• 8.2.1
• 8.2.2
• 8.2.3
• 8.2.4
• 8.2.5
• 8.2.6
• 8.2.7
• 8.2.8
• 8.2.9
• 8.2.10
• 8.2.11
• 8.2.12
• 8.2.13
• 8.2.14
• 8.2.15
• 8.2.16
• 8.2.17
• 8.2.18
• 8.2.19
• 8.3.0
• 8.3.1
• 8.3.2
• 8.3.3
• 8.3.4
• 8.3.5
• 8.3.6
• 8.3.7

License

• open-source

Website

• Product: https://www.php.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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