Vulnerability · Published Sep 19, 2023 · Assigned by GitHub_M

CVE-2023-42450Mastodon Server-Side Request Forgery vulnerability

Medium 5.4

In plain English

A medium-severity server-side request forgery 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 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.5%top 60.0% 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. Starting in version 4.2.0-beta1 and prior to version 4.2.0-rc2, by crafting specific input, attackers can inject arbitrary data into HTTP requests issued by Mastodon. This can be used to perform confused deputy attacks if the server configuration includes `ALLOWED_PRIVATE_ADDRESSES` to allow access to local exploitable services. Version 4.2.0-rc2 has a patch for the issue.

Affected products (as reported)

Vendor	Product	Versions
mastodon	mastodon	>= 4.2.0-beta1, < 4.2.0-rc2

Weakness: CWE-918, CWE-113 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-hcqf-fw2r-52g4 x_refsource_CONFIRM
https://github.com/mastodon/mastodon/commit/94893cf24fc95b32cc7a756262acbe008c20a9d2 x_refsource_MISC