Remote code execution in Moodle

1) Code Injection

EUVDB-ID: #VU65376

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-35649

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 code on the target system.

The vulnerability exists due to improper input validation when parsing PostScript code. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the system running GhostScript versions older than 9.50.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

As a workaround it is recommended to update GhostScript to version 9.50 or newer.

Vulnerable software versions

Moodle: 3.0 - 4.0.1

External links

http://moodle.org/mod/forum/discuss.php?d=436456
http://tracker.moodle.org/browse/MDL-75044

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.