Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypub_federation, a framework for ActivityPub federation in Rust. Prior to version 0.19.16, the GET /api/v4/image/{filename} endpoint is vulnerable to unauthenticated SSRF through parameter injection in the file_type query parameter. An attacker can inject arbitrary query parameters into the internal request to pict-rs, including the proxy parameter which causes pict-rs to fetch arbitrary URLs.
This issue has been patched in version 0.19.16.
Attack Parameters
Attack Vector
Network
Атака возможна удалённо
Attack Complexity
Low
Легко эксплуатировать
Attack Requirements
None
Нет дополнительных условий
Privileges Required
None
Права не нужны
User Interaction
None
Не нужно действие пользователя
Impact Assessment
Confidentiality
None
Нет утечки данных
Integrity
High
Полная модификация данных
Availability
None
Нет нарушения работы
CVSS Vector v4.0