认证代理FTP会话凭据越权漏洞修复与POC

漏洞概述 漏洞类型：认证代理会话共享凭据导致的越权访问（IDOR / 会话固定类问题） 问题描述： 中，当两个 FTP 会话使用相同用户名但不同密码时，后登录的会话会复用先登录会话的凭据，导致后登录会话的凭据被先登录会话的会话数据覆盖，造成认证状态混乱，可能引发越权访问。 影响范围： 中 的会话凭据管理逻辑；影响使用 的 FTP 代理场景。 修复方案 在 中引入 机制： - 新增 字段，用于存储每个会话的混淆密码（ ）。 - 在 中增加 保护 的并发访问。 - 在 中通过 注册 的选项。 - 在 中，当 为真时，使用 初始化用户密码映射。 - 在 中，当 为空时，使用 初始化用户密码映射。 - 在 中，当 不为空时，使用 初始化用户密码映射。 - 在 中，当 为空时，使用 初始化用户密码映射。 - 在 中，当 不为空时，使用 初始化用户密码映射。 - 在 中，当 为空时，使用 初始化用户密码映射。 - 在 中，当 不为空时，使用 初始化用户密码映射。 - 在 中，当 为空时，使用 初始化用户密码映射。 - 在 中，当 不为空时，使用 初始化用户密码映射。 POC 代码 ```go // cmd/server/ftp_proxy_crossover_test.go package ftp import ( "context" "os" "path/filepath" "testing" "github.com/cloudfoundry/ftp" "github.com/cloudfoundry/ftp/server" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/server/proxy" "github.com/cloudfoundry/ftp/se

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认证代理FTP会话凭据越权漏洞修复与POC

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认证代理FTP会话凭据越权漏洞修复与POC

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