Emissary has GitHub Actions Shell Injection via Workflow Inputs

Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, GitHub Actions workflow files contained shell injection points where user-controlled workflow_dispatch inputs were interpolated directly into shell commands via ${{ }} expression syntax. An attacker with repository write access could inject arbitrary shell commands, leading to repository poisoning and supply chain compromise affecting all downstream users. This vulnerability is fixed in 8.39.0.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

在命令中使用的特殊元素转义处理不恰当(命令注入)

Emissary 命令注入漏洞

Emissary是National Security Agency开源的一个分布式 P2P 数据驱动工作流框架。 Emissary 8.39.0之前版本存在命令注入漏洞，该漏洞源于GitHub Actions工作流文件存在shell注入点，用户控制的工作流输入通过${{ }}表达式语法直接插入shell命令，可能导致具有仓库写入权限的攻击者注入任意shell命令，导致仓库投毒和供应链攻击。

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