Katalog CVE

CVE-2026-105935

ŚrednieCVSS 4.9
Opublikowano: Zaktualizowano: Przetłumaczono: NVD NIST

Prawdopodobieństwo exploitacji (EPSS)

Niskie ryzyko
0.40%

Percentyl 33 - wyżej niż 33% wszystkich znanych CVE

Streszczenie

Luka w Apache Pulsar dotyczy endpointu REST API Functions Worker służącego do wyzwalania funkcji. Worker publikuje wiadomość do tematu wejściowego funkcji, używając własnych poświadczeń brokera, a nie poświadczeń wywołującego, i nie sprawdza, czy wywołujący ma uprawnienia do produkowania do tego tematu. W wersjach przed 2.4.0 nie ma żadnej weryfikacji uprawnień wywołującego dla tego endpointu.

Ocena ryzyka

Uwierzytelniony użytkownik z uprawnieniami do zarządzania funkcjami w przestrzeni nazw może publikować treści kontrolowane przez siebie do tematów, do których nie ma prawa produkowania, w tym w innych tenantach, pod tożsamością Functions Worker. Narusza to integralność danych w tych tematach, a konsumenci mogą otrzymywać wiadomości od nieuprawnionego nadawcy.

Rekomendacja

Zaktualizuj Apache Pulsar do wersji co najmniej 4.0.14 (dla linii 4.0.x) lub 4.2.5 (dla 4.1.x i 4.2.x). Jeśli aktualizacja nie jest możliwa, ogranicz uprawnienia do zarządzania funkcjami do zaufanych ról, a w wersjach przed 2.4.0 ogranicz dostęp do REST API Functions Worker do zaufanych wywołujących.

Inne podatności w Apache Pulsar

Zobacz wszystkie
Oryginalny opis (angielski, źródło NVD)

The Pulsar Functions Worker provides a REST API endpoint for triggering a function, which publishes a caller-supplied value to one of the function's configured input topics. The Functions Worker performs this publish with its own broker client, which authenticates with the Worker's configured broker-client credentials rather than the credentials of the API caller. When authorization is enabled, in Apache Pulsar 2.4.0 and later versions, the trigger endpoint checks only that the caller is authorized to perform function operations in the function's namespace. It does not check that the caller is authorized to produce to the input topic that the message is published to. Versions before 2.4.0 do not perform a caller authorization check for the trigger endpoint at all. Function input topics are not restricted to the function's own tenant or namespace, and registering a function does not require produce permission on its input topics. As a result, an authenticated user who is authorized to manage functions in a namespace, for example a role granted the functions permission on that namespace, can cause the Functions Worker to publish messages with caller-controlled content to a topic that the user is not authorized to produce to, including topics in other tenants. These messages are published under the identity of the Functions Worker. The issue does not require any function instance to be running or any function code to be executed. It requires that the Functions Worker's broker-client identity is itself authorized to produce to the target topic and, in Apache Pulsar 2.3.0 and later versions, to list the subscriptions of the target topic, as is the case when that identity is a superuser. The impact is on the integrity of the data in the affected topics: consumers of those topics may receive messages from a user who is not permitted to publish them. This concerns the Functions Worker REST API as called by an external, authenticated client; it does not change the security model for function code, which must be fully trusted. In fixed versions, when authorization is enabled, triggering a function additionally requires the caller to be authorized to produce to the selected input topic before any message is published. This issue affects Apache Pulsar versions from 2.0.0-rc1-incubating before 4.0.14 and from 4.1.0 before 4.2.5. - 4.0.x version users should upgrade to at least 4.0.14. - 4.1.x and 4.2.x version users should upgrade to at least 4.2.5. Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions. The currently supported Apache Pulsar release lines are 4.0.x and 5.0.x. The supported versions schedule is available at https://pulsar.apache.org/contribute/release-policy/. Users of Apache Pulsar 2.4.0 and later versions with authorization enabled who cannot upgrade immediately can limit the permission to manage functions to trusted roles. Users of versions before 2.4.0 should restrict access to the Functions Worker REST API to trusted callers, because in these versions the trigger endpoint does not check the caller's permission to manage functions.

Dane podatności pochodzą z NVD (NIST) · CISA KEV · EPSS