ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the `Undo` handler allows a remote federated server to cause the service to act on a `follow` or `repost` as though the activity came from a different account. This permits removal of an existing `follow` relationship or `repost` belonging to another account without that account's involvement.
No private data is exposed and content is not modified; the affected relationships can be re-established. Services proxying to Ghost's hosted ActivityPub server have already been updated, while self-hosted services require an updated image and redeployment. This issue is fixed in version 1.2.6.
Характеристики атаки
Способ атаки
По сети
Атака возможна удалённо
Сложность
Низкая
Легко эксплуатировать
Нужны права
Не требуются
Права не нужны
Участие пользователя
Не требуется
Не нужно действие пользователя
Последствия
Конфиденциальность
Нет
Нет утечки данных
Целостность
Низкое
Частичная модификация данных
Доступность
Нет
Нет нарушения работы
Строка CVSS v3.1
Тип уязвимости (CWE)
Ссылки 4
https://github.com/TryGhost/ActivityPub/commit/1526f540b983da97750b380868a210e6…
security-advisories@github.com
https://github.com/TryGhost/ActivityPub/pull/1929
security-advisories@github.com
https://github.com/TryGhost/ActivityPub/releases/tag/v1.2.6
security-advisories@github.com
https://github.com/TryGhost/ActivityPub/security/advisories/GHSA-mm4q-93gr-5mwc
security-advisories@github.com