Improper file handling in concrete5/core

CVE编号

CVE-2021-22968

利用情况

暂无

补丁情况

N/A

披露时间

2021-11-20

漏洞描述

A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below.The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration.To fix this, a check for allowed file extensions was added before downloading files to a tmp directory.Concrete CMS Security Team gave this a CVSS v3.1 score of 5.4 AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:NThis fix is also in Concrete version 9.0.0

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://documentation.concretecms.org/developers/introduction/version-history...
https://hackerone.com/reports/1350444

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	concretecms	concrete_cms	*		Up to (excluding) 8.5.7

CVSS3评分 7.2

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

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CWE-ID 漏洞类型 NVD-CWE-Other