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CVE-2020-26253— Kirby 访问控制错误漏洞

一分钟漏洞结论

影响对象
getkirby kirby
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Kirby是一套基于文件的内容管理系统（CMS）。 Kirby CMS 3.3.6之前版本和Kirby Panel 2.5.14之前版本存在安全漏洞，该漏洞源于如果托管在.dev域中，管理面板可能会被访问。为了保护公共服务器上没有管理帐户的新安装，我们在默认情况下阻止帐户注册。这是一个安全特性，多年前我们在Kirby 2中实现了它。它有助于避免您忘记在公共服务器上注册您的第一个管理帐户。在这种情况下，如果没有我们的安全阻止。

CVSS 6.8 · Medium EPSS 0.57% · P45

可能的 ATT&CK 技术 1 AI

T1136 · Create Account
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一、 漏洞 CVE-2020-26253 基础信息

漏洞信息
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Vulnerability Title
.dev domains treated as local in Kirby
来源: CVE Program / CVE List V5
Vulnerability Description
Kirby is a CMS. In Kirby CMS (getkirby/cms) before version 3.3.6, and Kirby Panel before version 2.5.14 there is a vulnerability in which the admin panel may be accessed if hosted on a .dev domain. In order to protect new installations on public servers that don't have an admin account for the Panel yet, we block account registration there by default. This is a security feature, which we implemented years ago in Kirby 2. It helps to avoid that you forget registering your first admin account on a public server. In this case – without our security block – someone else might theoretically be able to find your site, find out it's running on Kirby, find the Panel and then register the account first. It's an unlikely situation, but it's still a certain risk. To be able to register the first Panel account on a public server, you have to enforce the installer via a config setting. This helps to push all users to the best practice of registering your first Panel account on your local machine and upload it together with the rest of the site. This installation block implementation in Kirby versions before 3.3.6 still assumed that .dev domains are local domains, which is no longer true. In the meantime, those domains became publicly available. This means that our installation block is no longer working as expected if you use a .dev domain for your Kirby site. Additionally the local installation check may also fail if your site is behind a reverse proxy. You are only affected if you use a .dev domain or your site is behind a reverse proxy and you have not yet registered your first Panel account on the public server and someone finds your site and tries to login at `yourdomain.dev/panel` before you register your first account. You are not affected if you have already created one or multiple Panel accounts (no matter if on a .dev domain or behind a reverse proxy). The problem has been patched in Kirby 3.3.6. Please upgrade to this or a later version to fix the vulnerability.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
源验证错误
来源: CVE Program / CVE List V5
Vulnerability Title
Kirby 访问控制错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Kirby是一套基于文件的内容管理系统（CMS）。 Kirby CMS 3.3.6之前版本和Kirby Panel 2.5.14之前版本存在安全漏洞，该漏洞源于如果托管在.dev域中，管理面板可能会被访问。为了保护公共服务器上没有管理帐户的新安装，我们在默认情况下阻止帐户注册。这是一个安全特性，多年前我们在Kirby 2中实现了它。它有助于避免您忘记在公共服务器上注册您的第一个管理帐户。在这种情况下，如果没有我们的安全阻止。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
getkirby kirby < 3.3.6 -

二、漏洞 CVE-2020-26253 的公开POC

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三、漏洞 CVE-2020-26253 的情报信息

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CVE-2020-26253 补丁与修复 (1)

CVE-2020-26253 厂商安全公告 (1)

CVE-2020-26253 其他参考 (3)

IV. Related Vulnerabilities

Same product: kirby
Same vendor: getkirby
Same weakness: CWE-346

V. Comments for CVE-2020-26253

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