vapor leafkit 在web页面生成时对输入的转义处理不恰当（跨站脚本）

CVE编号

CVE-2021-37634

利用情况

暂无

补丁情况

N/A

披露时间

2021-08-10

漏洞描述

Leafkit is a templating language with Swift-inspired syntax. Versions prior to 1.3.0 are susceptible to Cross-site Scripting (XSS) attacks. This affects anyone passing unsanitised data to Leaf's variable tags. Before this fix, Leaf would not escape any strings passed to tags as variables. If an attacker managed to find a variable that was rendered with their unsanitised data, they could inject scripts into a generated Leaf page, which could enable XSS attacks if other mitigations such as a Content Security Policy were not enabled. This has been patched in 1.3.0. As a workaround sanitize any untrusted input before passing it to Leaf and enable a CSP to block inline script and CSS data.

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/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1
https://github.com/vapor/leaf-kit/security/advisories/GHSA-rv3x-xq3r-8j9h

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	vapor	leafkit	*		Up to (excluding) 1.3.0

CVSS3评分 6.1

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CWE-ID 漏洞类型 CWE-79 在Web页面生成时对输入的转义处理不恰当（跨站脚本）