Description (CNA)
Mastodon is a free, open-source social network server based on ActivityPub. From 4.3.0 until 4.5.11 and 4.4.18, Mastodon has a feature to let websites credit authors of their articles. To prevent false attribution claims, Mastodon uses the attributionDomains JSON-LD term, however, an error in how it is defined makes Linked Data Signatures on the toot:attributionDomains property ineffective. An attacker can arbitrarily modify the attributionDomains value of a legitimately signed Update activity and bypass Mastodon’s signature verification. This vulnerability is fixed in 4.5.11 and 4.4.18.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| mastodon / mastodon | affected >= 4.5.0-beta.1, < 4.5.11; affected >= 4.3.0, < 4.4.18 |
CWE
CWE-354
References
ADP enrichment
No English description supplied.