Vulnerability identifier: #VU83576

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-4226

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Chamilo LMS
Client/Desktop applications / Other client software

Vendor: Chamilo

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload in the /main/inc/ajax/work.ajax.php script. A remote user can upload a malicious file and execute it on the server.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Chamilo LMS: 1.11.0 - 1.11.24

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External links
http://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-129-2023-09-04-Critical-impact-Moderate-risk-Authenticated-users-may-gain-unauthenticated-RCE-CVE-2023-4223CVE-2023-4224CVE-2023-4225CVE-2023-4226
http://starlabs.sg/advisories/23/23-4226
http://github.com/chamilo/chamilo-lms/commit/6f32625a012d5de2dfe8edbccb4ed14a85e310d4
http://github.com/chamilo/chamilo-lms/commit/f3d62b65ad60d68096c2674d5695339f04de0b8a
http://github.com/chamilo/chamilo-lms/commit/e864127a440c2cab0eb62c113a04e2e904543a1f

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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.