This tool exploits a well-known backdoor vulnerability found in vsFTPd version 2.3.4 (CVE-2011-2523)# vsFTPd 2.3.4 Backdoor Exploit
Overview
This tool exploits a well-known backdoor vulnerability found in vsFTPd version 2.3.4. The vulnerability allows attackers to gain unauthorized shell access to the target system by sending specially crafted input to the FTP service. This exploit takes advantage of a malicious backdoor that was intentionally introduced in version 2.3.4, which opens a listening port (6200) after receiving a certain payload.
Note: This vulnerability is specific to version 2.3.4 of vsFTPd. Attempting to use this tool on other versions will result in failure.
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## Vulnerability Explanation
The vulnerability arises due to a backdoor that was deliberately added to the vsFTPd 2.3.4 distribution in June 2011. When a maliciously crafted username (with a `:)` at the end) is sent to the FTP server, it triggers the backdoor, causing the server to open a shell on port 6200. Attackers can then connect to this port and gain shell access to the system.
- CVE Identifier: CVE-2011-2523
- Vulnerable Software: vsFTPd 2.3.4
- Exploitation: Remote code execution via crafted FTP commands
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## Requirements
- Python 3.x
- You
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## How to Use
1. Clone the Repository:
```bash
git clone https://github.com/everythingBlackkk/vsFTPd-Backdoor-Exploit-CVE-2011-2523-.git
cd vsFTPd-Backdoor-Exploit-CVE-2011-2523-
```
2. Run the Exploit:
```bash
python3 exploit.py -host <target_ip>
```
## Output Example :
```bash
$ python3 exploit.py -host 192.168.1.10
[i] Initiating FTP backdoor exploit...
[i] Checking FTP Version on 192.168.1.10:21
[+] Target is running vsFTPd 2.3.4. Proceeding with backdoor exploit...
[i] Connecting to backdoor on 192.168.1.10:6200...
[+] Connection successful! You now have shell access.
$ whoami
root
$ exit
```
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# Why This Vulnerability Exists
The vulnerability in vsFTPd 2.3.4 was introduced by an unknown attacker who uploaded a modified version of the source code to the official vsFTPd download server. This backdoored version was available for a short time before it was detected and removed. However, any system that installed vsFTPd during that period is vulnerable if they are still running version 2.3.4.
## Disclaimer
This tool is intended for educational purposes only. The misuse of this tool could cause damage to systems and networks. Only use it on systems you have permission to test. The author assumes no liability for any misuse or damage caused by this tool.
[4.0K] /data/pocs/c251401b5632bf57b6acb6ff052de0b4b507ebc3
├── [1.9K] exploit.py
└── [2.4K] README.md
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