Vulnerability identifier: #VU80914

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-42451

CWE-ID: CWE-706

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mastodon
Server applications / Other server solutions

Vendor: Mastodon

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to invalid domain name normalization. A remote attacker can spoof domains they do not own.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mastodon: 3.5.0 - 3.5.13, 4.0.0 - 4.0.9, 4.1.0 - 4.1.7

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External links
http://github.com/mastodon/mastodon/commit/eeab3560fc0516070b3fb97e089b15ecab1938c8
http://github.com/mastodon/mastodon/security/advisories/GHSA-v3xf-c9qf-j667

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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.