CVE-2021-21357

描述

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 improper input validation, attackers can by-pass restrictions of predefined options and submit arbitrary data in the Form Designer backend module of the Form Framework. In the default configuration of the Form Framework this allows attackers to explicitly allow arbitrary mime-types for file uploads - however, default _fileDenyPattern_ successfully blocked files like _.htaccess_ or _malicious.php_. Besides that, attackers can persist those files in any writable directory of the corresponding TYPO3 installation. A valid backend user account with access to the form module is needed to exploit this vulnerability. This is fixed in versions 8.7.40, 9.5.25, 10.4.14, 11.1.1.

如何修補 CVE-2021-21357

要修補 CVE-2021-21357,請將受影響套件升級到下列已修補版本。

• —升級至 10.4.14 或更新版本
• —升級至 10.4.14 或更新版本
• —升級至 8.7.40 或更新版本

CVE-2021-21357 正在被利用嗎?

低 — EPSS 為 1.6%,目前沒有觀察到大規模利用活動。

受影響套件(3)

• >= 10.0.0, < 10.4.14
• >= 10.0.0, < 10.4.14
• >= 8.0.0, < 8.7.40

CVSS 分數

參考連結(6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-21357
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21357.yaml
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21357.yaml
• WEBgithub.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3vg7-jw9m-pc3f