Vulnerability · Published Feb 1, 2024 · Assigned by GitHub_M

CVE-2024-23832Mastodon Remote user impersonation and takeover

Critical 9.4

In plain English

A critical-severity authentication bypass by spoofing 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 2.5% (higher than 84% of all known vulnerabilities).

Severity (CVSS 3.1)9.4Critical

Exploit odds (30 days)2.5%top 15.5% 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 Mastodon allows configuration of LDAP for authentication. Due to insufficient origin validation in all Mastodon, attackers can impersonate and take over any remote account. Every Mastodon version prior to 3.5.17 is vulnerable, as well as 4.0.x versions prior to 4.0.13, 4.1.x version prior to 4.1.13, and 4.2.x versions prior to 4.2.5.

Affected products (as reported)

Vendor	Product	Versions
mastodon	mastodon	< 3.5.17>= 4.0.0, < 4.0.13>= 4.1.0, < 4.1.13>= 4.2.0, < 4.2.5

Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-3fjr-858r-92rw x_refsource_CONFIRM
https://github.com/mastodon/mastodon/commit/1726085db5cd73dd30953da858f9887bcc90b958 x_refsource_MISC
http://www.openwall.com/lists/oss-security/2024/02/02/4