Vulnerability · Published Sep 19, 2023 · Assigned by GitHub_M

CVE-2023-42451Mastodon Invalid Domain Name Normalization vulnerability

High 7.4

In plain English

A high-severity security flaw in mastodon from mastodon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.7%top 48.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2, under certain circumstances, attackers can exploit a flaw in domain name normalization to spoof domains they do not own. Versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2 contain a patch for this issue.

Affected products (as reported)

Vendor	Product	Versions
mastodon	mastodon	< 3.5.14>= 4.0.0, < 4.0.10>= 4.1.0, < 4.1.8>= 4.2.0-beta1, < 4.2.0-rc2

Weakness: CWE-706 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-v3xf-c9qf-j667 x_refsource_CONFIRM
https://github.com/mastodon/mastodon/commit/eeab3560fc0516070b3fb97e089b15ecab1938c8 x_refsource_MISC