CVE-2017-16790

描述

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. When a form is submitted by the user, the request handler classes of the Form component merge POST data and uploaded files data into one array. This big array forms the data that are then bound to the form. At this stage there is no difference anymore between submitted POST data and uploaded files. A user can send a crafted HTTP request where the value of a "FileType" is sent as normal POST data that could be interpreted as a local file path on the server-side (for example, "file:///etc/passwd"). If the application did not perform any additional checks about the value submitted to the "FileType", the contents of the given file on the server could have been exposed to the attacker.

如何修補 CVE-2017-16790

要修補 CVE-2017-16790,請將受影響套件升級到下列已修補版本。

• —升級至 3.4.0+dfsg-1 或更新版本
• —升級至 2.7.38 或更新版本
• —升級至 2.7.38 或更新版本

CVE-2017-16790 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)

• from 0, < 3.4.0+dfsg-1
• >= 2.7.0, < 2.7.38
• >= 2.7.0, < 2.7.38

CVSS 分數

參考連結(9)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2017-16790
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2017-16790
• PATCHgithub.com/symfony/form
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/symfony/form/CVE-2017-16790.yaml