CVE-2021-21355— TYPO3 安全漏洞
一分钟漏洞结论
影响对象
TYPO3 TYPO3.CMS
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。
TYPO3是瑞士TYPO3（Typo3）协会的一套免费开源的内容管理系统(框架)(CMS/CMF)。 TYPO3 Core 存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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一、 漏洞 CVE-2021-21355 基础信息
漏洞信息
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Vulnerability Title
Unrestricted File Upload in Form Framework
来源: CVE Program / CVE List V5
Vulnerability Description
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 8.7.40, 9.5.25, 10.4.14, 11.1.1, due to the lack of ensuring file extensions belong to configured allowed mime-types, attackers can upload arbitrary data with arbitrary file extensions - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, _UploadedFileReferenceConverter_ transforming uploaded files into proper FileReference domain model objects handles possible file uploads for other extensions as well - given those extensions use the Extbase MVC framework, make use of FileReference items in their direct or inherited domain model definitions and did not implement their own type converter. In case this scenario applies, _UploadedFileReferenceConverter_ accepts any file mime-type and persists files in the default location. In any way, uploaded files are placed in the default location _/fileadmin/user_upload/_, in most scenarios keeping the submitted filename - which allows attackers to directly reference files, or even correctly guess filenames used by other individuals, disclosing this information. No authentication is required to exploit this vulnerability. This is fixed in versions 8.7.40, 9.5.25, 10.4.14, 11.1.1.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
来源: CVE Program / CVE List V5
Vulnerability Title
TYPO3 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
TYPO3是瑞士TYPO3（Typo3）协会的一套免费开源的内容管理系统(框架)(CMS/CMF)。 TYPO3 Core 存在安全漏洞，目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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
二、漏洞 CVE-2021-21355 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-21355 厂商安全公告 (1)
-
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2r6j-862c-m2v2 x_refsource_CONFIRM
CVE-2021-21355 其他参考 (2)
-
https://packagist.org/packages/typo3/cms-form x_refsource_MISC
-
https://typo3.org/security/advisory/typo3-core-sa-2021-002 x_refsource_MISC
同批安全公告 · TYPO3 · 2021-03-23 · 共 8 条
| CVE-2021-21357 | 8.3 HIGH | TYPO3 输入验证错误漏洞 |
| CVE-2021-21339 | 5.9 MEDIUM | TYPO3 跨站脚本漏洞 |
| CVE-2021-21359 | 5.9 MEDIUM | TYPO3 安全漏洞 |
| CVE-2021-21358 | 5.4 MEDIUM | TYPO3 跨站脚本漏洞 |
| CVE-2021-21340 | 5.4 MEDIUM | TYPO3 跨站脚本漏洞 |
| CVE-2021-21370 | 5.4 MEDIUM | TYPO3 跨站脚本漏洞 |
| CVE-2021-21338 | 4.7 MEDIUM | TYPO3 输入验证错误漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-21355
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