Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server

When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which uses HTTP request headers, is weak and allows an attacker to bypass authentication via spoofing client's IP address in request headers. Default configuration honors X-Forwarded-For HTTP header to read client's IP address. X-Forwarded-For request header is mainly used by proxy servers to identify the client and can be easily spoofed by an attacker pretending that the request comes from a different IP address. Admin Server commands, such as snapshot and restore arbitrarily can be executed on successful exploitation which could potentially lead to information leakage or service availability issues. Users are recommended to upgrade to version 3.9.3, which fixes this issue.

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使用欺骗进行的认证绕过

Apache Zookeeper 安全漏洞

Apache Zookeeper是美国阿帕奇（Apache）基金会的一个软件项目，它能够为大型分布式计算提供开源的分布式配置服务、同步服务和命名注册等功能。 Apache Zookeeper存在安全漏洞，该漏洞源于使用IPAuthenticationProvider时，可能会出现通过欺骗绕过身份验证的情况。

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