CVE-2021-29441 PoC — Nacos 安全漏洞

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-29441.yaml

Associated Vulnerability

Title:Nacos 安全漏洞 (CVE-2021-29441)
Description:nacos是中国阿里巴巴（Alibaba）的一个动态服务发现、配置和服务管理平台。该软件支持基于 DNS 和基于 RPC 的服务发现，可提供提供实时健康检查，阻止服务向不健康的主机或服务实例发送请求等功能。 Nacos 存在安全漏洞，该漏洞源于允许Nacos服务器绕过过滤器，从而跳过身份验证检查。这种机制依赖于用户代理HTTP头，因此很容易被欺骗。

Description

This template only works on Nuclei engine prior to version 2.3.3 and version >= 2.3.5.

In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true)
Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that
enables Nacos servers to bypass this filter and therefore skip authentication checks.
This mechanism relies on the user-agent HTTP header so it can be easily spoofed.
This issue may allow any user to carry out any administrative tasks on the Nacos server.

File Snapshot


 id: CVE-2021-29441

info:
  name: Nacos <1.4.1 - Authentication Bypass
  author: dwisiswant0
  sever

...

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