Improper access control in Mastodon

1) Improper access control

EUVDB-ID: #VU60352

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

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

CPE2.3

• cpe:2.3:a:mastodon:mastodon:3.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.4.4:*:*:*:*:*:*:*
• cpe:2.3:a:mastodon:mastodon:3.4.5:*:*:*:*:*:*:*

External links

https://github.com/mastodon/mastodon/releases/tag/v3.3.2
https://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.