CVE-2025-59789— Apache bRPC: Stack Exhaustion via Unbounded Recursion in JSON Parser

Apache bRPC: Stack Exhaustion via Unbounded Recursion in JSON Parser

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.

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未经控制的递归

Apache bRPC 安全漏洞

Apache bRPC是美国阿帕奇（Apache）基金会的用于构建可靠和高性能服务的工业级 RPC 框架。 Apache bRPC 1.15.0之前版本存在安全漏洞，该漏洞源于json2pb组件递归不受控制，可能导致服务器崩溃。

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