sensiolabs symfony http请求的解释不一致性（http请求私运）

CVE编号

CVE-2021-41267

利用情况

暂无

补丁情况

N/A

披露时间

2021-11-25

漏洞描述

Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the "trusted_headers" allowed list are ignored and protect users from "Cache poisoning" attacks. In Symfony 5.2, maintainers added support for the `X-Forwarded-Prefix` headers, but this header was accessible in SubRequest, even if it was not part of the "trusted_headers" allowed list. An attacker could leverage this opportunity to forge requests containing a `X-Forwarded-Prefix` header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the `X-Forwarded-Prefix` header is not forwarded to subrequests when it is not trusted.

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。

参考链接
https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487
https://github.com/symfony/symfony/pull/44243
https://github.com/symfony/symfony/releases/tag/v5.3.12
https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q

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	sensiolabs	symfony	*	From (including) 5.2.0	Up to (excluding) 5.3.12

CVSS3评分 6.5

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 影响范围 未更改
• 用户交互 需要
• 可用性 无
• 保密性 无
• 完整性 高

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CWE-ID 漏洞类型 CWE-444 HTTP请求的解释不一致性（HTTP请求私运）