Security restrictions bypass in Moddle

1) Improper access control

EUVDB-ID: #VU67682

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-40208

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user with student permissions can bypass sequential navigation during a quiz attempt using web services.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.0 - 4.0.2

CPE2.3

• cpe:2.3:a:moodle_org:moodle:3.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.11.8:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.2.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.3.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.4.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.5.18:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.6.10:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.7.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.8.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.9.15:*:*:*:*:*:*:*

External links

https://moodle.org/mod/forum/discuss.php?d=438761
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-75210

Q & A

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.