CVE-2024-39687 Information

Description

Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. At present when Fedify needs to retrieve an object or activity from a remote activitypub server it makes a HTTP request to the @id or other resources present within the activity it has received from the web. This activity could reference an @id that points to an internal IP address allowing an attacker to send request to resources internal to the fedify server’s network. This applies to not just resolution of documents containing activities or objects but also to media URLs as well. Specifically this is a Server Side Request Forgery attack. Users should upgrade to Fedify version 0.9.2 0.10.1 or 0.11.1 to receive a patch for this issue.

Reference

https://github.com/dahlia/fedify/security/advisories/GHSA-p9cg-vqcc-grcx https://github.com/dahlia/fedify/commit/30f9cf4a175704a04c874f3ea88414c5f1e00b28 https://github.com/dahlia/fedify/commit/c641e976089dd913f649889c1bfb016df04e86ba