Uncontrolled recursion in the json2pb component in Apache bRPC (version < 1.15.0) on all platforms allows remote attackers to make the…
apache·CWE-674·Published 2025-12-01
Uncontrolled recursion in the json2pb component in Apache bRPC (version < 1.15.0) on all platforms allows remote attackers to make the server crash via sending deep recursive json data. Root Cause: The bRPC json2pb component uses rapidjson to parse json data from the network. The rapidjson parser uses a recursive parsing method by default. If the input json has a large depth of recursive structure, the parser function may run into stack overflow. Affected Scenarios: Use bRPC server with protobuf message to serve http+json requests from untrusted network. Or directly use JsonToProtoMessage to convert json from untrusted input. How to Fix: (Choose one of the following options) 1. Upgrade bRPC to version 1.15.0, which fixes this issue. 2. Apply this patch: https://github.com/apache/brpc/pull/3099 Note: No matter which option you choose, you should know that the fix introduces a recursion depth limit with default value 100. It affects these functions: ProtoMessageToJson, ProtoMessageToProtoJson, JsonToProtoMessage, and ProtoJsonToProtoMessage. If your requests contain json or protobuf messages that have a depth exceeding the limit, the request will be failed after applying the fix. You can modify the gflag json2pb_max_recursion_depth to change the limit.
Uncontrolled recursion in the json2pb component in Apache bRPC (version < 1.15.0) on all platforms allows remote attackers to make the server crash via sending deep recursive json data. Root Cause: The bRPC json2pb component uses rapidjson to parse json data from the network. The rapidjson parser uses a recursive parsing method by default. If the input json has a large depth of recursive structure, the parser function may run into stack overflow. Affected Scenarios: Use bRPC server with protobuf message to serve http+json requests from untrusted network. Or directly use JsonToProtoMessage to convert json from untrusted input. How to Fix: (Choose one of the following options) 1. Upgrade bRPC to version 1.15.0, which fixes this issue. 2. Apply this patch: https://github.com/apache/brpc/pull/3099 Note: No matter which option you choose, you should know that the fix introduces a recursion depth limit with default value 100. It affects these functions: ProtoMessageToJson, ProtoMessageToProtoJson, JsonToProtoMessage, and ProtoJsonToProtoMessage. If your requests contain json or protobuf messages that have a depth exceeding the limit, the request will be failed after applying the fix. You can modify the gflag json2pb_max_recursion_depth to change the limit.
La recursión incontrolada en el componente json2pb de Apache bRPC (versión < 1.15.0) en todas las plataformas permite a atacantes remotos colapsar el servidor enviando datos JSON recursivos profundos. Causa Raíz: El componente bRPC json2pb utiliza rapidjson para analizar datos JSON de la red. El analizador de rapidjson utiliza un método de análisis recursivo por defecto. Si el JSON de entrada tiene una gran profundidad de estructura recursiva, la función del analizador puede sufrir un desbordamiento de pila. Escenarios Afectados: Usar el servidor bRPC con mensajes protobuf para atender solicitudes HTTP+JSON de una red no confiable. O usar directamente JsonToProtoMessage para convertir JSON de entrada no confiable. Cómo Solucionar: (Elija una de las siguientes opciones) 1. Actualice bRPC a la versión 1.15.0, lo que soluciona este problema. 2. Aplique este parche: https://github.com/apache/brpc/pull/3099 Nota: No importa qué opción elija, debe saber que la solución introduce un límite de profundidad de recursión con un valor predeterminado de 100. Afecta a estas funciones: ProtoMessageToJson, ProtoMessageToProtoJson, JsonToProtoMessage y ProtoJsonToProtoMessage. Si sus solicitudes contienen mensajes JSON o protobuf que tienen una profundidad que excede el límite, la solicitud fallará después de aplicar la solución. Puede modificar el gflag json2pb_max_recursion_depth para cambiar el límite.
| Version | Type | Source | Base | Exp | Impact | Vector |
|---|---|---|---|---|---|---|
| 3.1 | Primary | cve.org | 7.5 | — | — | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | Primary | cve.org | 7.5 | — | — | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | Secondary | NVD | 7.5 | 3.9 | 3.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |