CVE-2023-3823— PHP 代码问题漏洞

Security issue with external entity loading in XML without enabling it

In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded. This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down.

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

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PHP 代码问题漏洞

PHP是一种在服务器端执行的脚本语言。 PHP存在安全漏洞，该漏洞源于在未启用XML的情况下加载外部实体，导致本地文件泄露。受影响的产品和版本：PHP 8.0.30之前的8.0版本，8.1.22之前的8.1版本，8.2.8之前的8.2版本。

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