Vulnerability identifier: #VU16041
Vulnerability risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-502
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
phpBB
Web applications /
Forum & blogging software
Vendor: phpBB Group
Description
The vulnerability allows a remote attacker with administrator privileges to execute arbitrary PHP code.
The weakness exists in a feature that utilizes an image editor binary called Imagick due to Phar deserialization if user input is passed unsanitized to any file system function in PHP, such as file_exists()
. A remote attacker with access to the Admin Control Panel with founder permissions can upload a malicious image file and edit it with Imagick to execute arbitrary PHP code on the underlying server and then to perform a full site takeover.
Mitigation
Update to version 3.2.4.
Vulnerable software versions
phpBB: 3.2.0 - 3.2.3
External links
http://blog.ripstech.com/2018/phpbb3-phar-deserialization-to-remote-code-execution/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.