backstage backstage 对路径名的限制不恰当（路径遍历）

CVE编号

CVE-2021-43783

利用情况

暂无

补丁情况

N/A

披露时间

2021-11-30

漏洞描述

@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.

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/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70...
https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv

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	backstage	backstage	*		Up to (excluding) 0.15.14

CVSS3评分 8.5

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L CWE-ID 漏洞类型 CWE-22 对路径名的限制不恰当（路径遍历）