#VU38971 Path traversal in MODX Revolution and PHP - CVE-2017-9067

Vulnerability identifier: #VU38971

Vulnerability risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9067

CWE-ID: CWE-22

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MODX Revolution
Web applications / CMS
PHP
Universal components / Libraries / Scripting languages

Vendor: MODX
PHP Group

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

In MODX Revolution before 2.5.7, when PHP 5.3.3 is used, an attacker is able to include and execute arbitrary files on the web server due to insufficient validation of the action parameter to setup/index.php, aka directory traversal.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MODX Revolution: 2.5.6

PHP: 2.5.6, 5.3.3

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External links
https://citadelo.com/en/2017/04/modx-revolution-cms/
https://github.com/modxcms/revolution/pull/13422
https://github.com/modxcms/revolution/pull/13428

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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