漏洞标题：Oracle MySQL 输入验证错误漏洞
缺陷组件：mysql:[email protected]
漏洞编号：CVE-2021-2471
漏洞描述：Oracle MySQL是美国甲骨文（Oracle）公司的一套开源的关系数据库管理系统。
Oracle MySQL 的 MySQL Connectors 产品中存在输入验证错误漏洞，该漏洞允许高特权攻击者通过多种协议访问网络来破坏 MySQL 连接器。成功攻击此漏洞会导致对关键数据的未授权访问或对所有 MySQL 连接器可访问数据的完全访问，以及导致 MySQL 连接器挂起或频繁重复崩溃。
影响范围：(∞, 8.0.27)
最小修复版本：8.0.27
缺陷组件引入路径：cn.javastack:[email protected]>mysql:[email protected]

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[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ spring-boot-test ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to xxx/projects/spring-boot-best-practice/spring-boot-test/target/test-classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] xxx/projects/spring-boot-best-practice/spring-boot-test/src/test/java/cn/javastack/springboot/test/JavaTest.java:[3,17] package org.junit does not exist
[ERROR] xxx/projects/spring-boot-best-practice/spring-boot-test/src/test/java/cn/javastack/springboot/test/JavaTest.java:[4,17] package org.junit does not exist
[ERROR] xxx/projects/spring-boot-best-practice/spring-boot-test/src/test/java/cn/javastack/springboot/test/JavaTest.java:[5,24] package org.junit.runner does not exist
[ERROR] xxx/projects/spring-boot-best-practice/spring-boot-test/src/test/java/cn/javastack/springboot/test/JavaTest.java:[16,2] cannot find symbol
  symbol: class RunWith
[ERROR] xxx/projects/spring-boot-best-practice/spring-boot-test/src/test/java/cn/javastack/springboot/test/JavaTest.java:[24,6] cannot find symbol
  symbol:   class Test
  location: class cn.javastack.springboot.test.JavaTest
[ERROR] xxx/projects/spring-boot-best-practice/spring-boot-test/src/test/java/cn/javastack/springboot/test/JavaTest.java:[32,6] cannot find symbol
  symbol:   class Test
  location: class cn.javastack.springboot.test.JavaTest
[INFO] 6 errors 
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