Improper access control in Mastodon

1) Improper access control

EUVDB-ID: #VU60352

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-2022-24307

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions because it does not compact incoming signed JSON-LD activities. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Mastodon: 3.3.0 - 3.4.5

External links

http://github.com/mastodon/mastodon/releases/tag/v3.3.2
http://github.com/mastodon/mastodon/releases/tag/v3.4.6

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.