中危 在 Windows 上的 `--exec` 中使用 `%q` 时发生 yt-dlp 命令注入 (CVE-2023-40581)
CVE编号
CVE-2023-40581利用情况
暂无补丁情况
官方补丁披露时间
2023-09-26漏洞描述
yt-dlp is a youtube-dl fork with additional features and fixes. yt-dlp allows the user to provide shell command lines to be executed at various stages in its download steps through the `--exec` flag. This flag allows output template expansion in its argument, so that metadata values may be used in the shell commands. The metadata fields can be combined with the `%q` conversion, which is intended to quote/escape these values so they can be safely passed to the shell. However, the escaping used for `cmd` (the shell used by Python's `subprocess` on Windows) does not properly escape special characters, which can allow for remote code execution if `--exec` is used directly with maliciously crafted remote data. This vulnerability only impacts `yt-dlp` on Windows, and the vulnerability is present regardless of whether `yt-dlp` is run from `cmd` or from `PowerShell`. Support for output template expansion in `--exec`, along with this vulnerable behavior, was added to `yt-dlp` in version 2021.04.11. yt-dlp version 2023.09.24 fixes this issue by properly escaping each special character. `\n` will be replaced by `\r` as no way of escaping it has been found. It is recommended to upgrade yt-dlp to version 2023.09.24 as soon as possible. Also, always be careful when using --exec, because while this specific vulnerability has been patched, using unvalidated input in shell commands is inherently dangerous. For Windows users who are not able to upgrade: 1. Avoid using any output template expansion in --exec other than {} (filepath). 2. If expansion in --exec is needed, verify the fields you are using do not contain ", | or &. 3. Instead of using --exec, write the info json and load the fields from it instead.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | yt-dlp_project | yt-dlp | * | From (including) 2021.04.11 | Up to (excluding) 2023.09.24 | ||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | yt-dlp | * | Up to (excluding) 2023.09.24-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | yt-dlp | * | Up to (excluding) 2023.03.04-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | yt-dlp | * | Up to (excluding) 2023.10.13-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | microsoft | windows | - | - | |||||
- 攻击路径 本地
- 攻击复杂度 复杂
- 权限要求 普通权限
- 影响范围 越权影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-78 | OS命令中使用的特殊元素转义处理不恰当（OS命令注入） |
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