SSRF in Dahlia Fedify
CVE-2024-39687
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.006 (45.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L.
Affected products
- Dahlia Fedify — versions < 0.9.2, = 0.10.0, = 0.11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2024-39687?
- CVE-2024-39687 is a high-severity vulnerability in Dahlia Fedify, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2024-07-05.
- How severe is CVE-2024-39687?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2024-39687 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.