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Co-authored-by: Hyper <hypar@disroot.org>
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解压时直接使用 ZIP entry 名称拼接落盘路径，攻击者一旦能影响 External UI ZIP 的来源，例如代理商/机场投毒、yacd/zashboard 等面板分发链路遭供应链攻击、或可控 external_ui_download_url/传输链路，即可通过 ../ 路径把文件写出 external_ui 目录边界实现任意文件写入。
在某些情况下，为了处理 tun 的支持，用户可能使用 root 权限启动 sing-box 进程，则该漏洞可能造成本地提权，或通过 api 或可控配置文件写入 cron 造成 rce