#VU97234 Improper Authentication in Moodle - CVE-2024-45691

Vulnerability identifier: #VU97234

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-45691

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error when handling "magic hash" passwords. When restricting access to a Lesson activity with a password, certain passwords could be bypassed/less secure due to a loose comparison in the password checking logic.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Moodle: 4.0.0 - 4.0.12, 4.1.0 - 4.1.12, 4.2.0 - 4.2.9, 4.3.0 - 4.3.6, 4.4.0 - 4.4.2

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External links
https://moodle.org/mod/forum/discuss.php?d=461897

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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.