CVE-2023-28115— Snappy 代码问题漏洞

Snappy vulnerable to PHAR deserialization, allowing remote code execution

Snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Prior to version 1.4.2, Snappy is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the `file_exists()` function. If an attacker can upload files of any type to the server he can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution especially when snappy is used with frameworks with documented POP chains like Laravel/Symfony vulnerable developer code. If a user can control the output file from the `generateFromHtml()` function, it will invoke deserialization. This vulnerability is capable of remote code execution if Snappy is used with frameworks or developer code with vulnerable POP chains. It has been fixed in version 1.4.2.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

可信数据的反序列化

Snappy 代码问题漏洞

Snappy是KNP Labs个人开发者的一个 PHP 库，允许从 url 或 html 页面生成缩略图、快照或 PDF。 Snappy 1.4.2之前版本存在代码问题漏洞，该漏洞源于缺乏对协议的检查。攻击者利用该漏洞可以将任何类型的文件上传到服务器。

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