Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.9.6, 1.10.5, 2.0.8, 2.1.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- @fedify fedify
fixed in 1.9.6; From 1.10.0 · fixed in 1.10.5; From 2.0.0 · fixed in 2.0.8; From 2.1.0 · fixed in 2.1.1
- @fedify vocab-runtime
fixed in 2.0.8; From 2.1.0 · fixed in 2.1.1
- @fedify/fedifynpm
fixed in 1.9.6
- @fedify/vocab-runtimenpm
fixed in 2.0.8
- @fedify/vocab-runtimenpm
From 2.1.0 · fixed in 2.1.1
- @fedify/fedifynpm
From 1.10.0 · fixed in 1.10.5
- @fedify/fedifynpm
From 2.0.0 · fixed in 2.0.8
- @fedify/fedifynpm
From 2.1.0 · fixed in 2.1.1