关联漏洞
标题：
Apache HTTP Server 安全漏洞
(CVE-2021-42013)
描述：Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 存在安全漏洞，该漏洞源于发现 Apache HTTP Server 2.4.50 版本中对 CVE-2021-41773 的修复不够充分。攻击者可以使用路径遍历攻击将 URL 映射到由类似别名的指令配置的目录之外的文件。如果这些目录之外的文件不受通常的默认配置“要求全部拒绝”的保护，则这些请求可能会成功。如果还为这些别
介绍
# Apache 2.4.50 - Path Traversal or Remote Code Execution
CVE-2021-42013.py is a python script that will help in finding Path Traversal or Remote Code Execution vulnerability in [Apache 2.4.50](https://archive.apache.org/dist/httpd/httpd-2.4.50.tar.gz). Vulnerable instance of Docker is provided to get your hands dirty on [CVE-2021-42013](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42013)
If CGI-BIN is enabled than, we can perform Remote Code Execution but not Path Traversal, so "icons" directory has been added under Alias section in httpd.conf for checking Path Traversal vulnerability.
# Vulnerable Configurations in httpd.conf
```
1. Enable CGI-BIN
2. Add "icons" directory in Alias section
3. <Directory>Require all granted</Directory>
```
# Lab for CVE-2021-42013
### Build Docker
```
$ docker build -t cve-2021-42013 .
```
### Run Docker
```
$ docker run -it cve-2021-42013
```
# Usage cve-2021-42013.py
### Check for Path Traversal and Remote Code Execution
```
$ python3 cve-2021-42013.py -u http://172.17.0.2
```
### Path Traversal PoC
```
$ python3 cve-2021-42013.py -u http://172.17.0.2 -pt
```
### Remote Code Execution PoC
```
$ python3 cve-2021-42013.py -u http://172.17.0.2 -rce
```
### For bulk scanning, provide a text file containing IPs:
```
$ python3 cve-2021-42013.py -l list.txt
```
```
$ python3 cve-2021-42013.py -l list.txt -pt
```
```
$ python3 cve-2021-42013.py -l list.txt -rce
```
More information can be found [here](https://walnutsecurity.com/path-traversal-remote-code-execution-in-apache/).
### References
* https://nvd.nist.gov/vuln/detail/CVE-2021-42013
* https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42013
* https://www.cve.org/CVERecord?id=CVE-2021-42013
* https://httpd.apache.org/security/vulnerabilities_24.html
* https://walnutsecurity.com/path-traversal-remote-code-execution-in-apache/
文件快照
[4.0K] /data/pocs/9df5475bed17d31d498ddd977fa90fba75ef83ea
├── [5.6K] cve-2021-42013.py
├── [1.2K] Dockerfile
├── [ 416] Dockerfile.bk
├── [ 18K] httpd.conf
├── [ 326] index.php
├── [ 326] login.php
└── [1.8K] README.md
0 directories, 7 files
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