openzaak open_zaak 源验证错误

CVE编号

CVE-2020-26251

利用情况

暂无

补丁情况

N/A

披露时间

2020-12-19

漏洞描述

Open Zaak is a modern, open-source data- and services-layer to enable zaakgericht werken, a Dutch approach to case management. In Open Zaak before version 1.3.3 the Cross-Origin-Resource-Sharing policy in Open Zaak is currently wide open - every client is allowed. This allows evil.com to run scripts that perform AJAX calls to known Open Zaak installations, and the browser will not block these. This was intended to only apply to development machines running on localhost/127.0.0.1. Open Zaak 1.3.3 disables CORS by default, while it can be opted-in through environment variables. The vulnerability does not actually seem exploitable because: a) The session cookie has a `Same-Site: Lax` policy which prevents it from being sent along in Cross-Origin requests. b) All pages that give access to (production) data are login-protected c) `Access-Control-Allow-Credentials` is set to `false` d) CSRF checks probably block the remote origin, since they're not explicitly added to the trusted allowlist.

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/open-zaak/open-zaak/blob/master/CHANGELOG.rst#133-2020-12-17
https://github.com/open-zaak/open-zaak/commit/952269269f1b629fce9c94485f83ac1...
https://github.com/open-zaak/open-zaak/security/advisories/GHSA-chhr-gxrg-64x7

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	openzaak	open_zaak	*		Up to (excluding) 1.3.3

CVSS3评分 4.7

• 攻击路径 网络
• 攻击复杂度 高
• 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:H/PR:N/UI:R/S:C/C:L/I:L/A:N CWE-ID 漏洞类型 CWE-346 源验证错误