nextcloud contacts 危险类型文件的不加限制上传

CVE编号

CVE-2021-39221

利用情况

暂无

补丁情况

N/A

披露时间

2021-10-26

漏洞描述

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Contacts application prior to version 4.0.3 was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Contacts application is upgraded to 4.0.3. As a workaround, one may use a browser that has support for Content-Security-Policy.

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/nextcloud/contacts/pull/2407
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6c...

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	nextcloud	contacts	*		Up to (excluding) 4.0.3

CVSS3评分 6.4

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

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N CWE-ID 漏洞类型 CWE-434 危险类型文件的不加限制上传 CWE-79 在Web页面生成时对输入的转义处理不恰当（跨站脚本）