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CVE-2023-48795 PoC — OpenSSH 安全漏洞

Source
Associated Vulnerability
Title:OpenSSH 安全漏洞 (CVE-2023-48795)
Description:The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.
Description
A Python-based tool to check for vulnerabilities in OpenSSH installations on local or remote systems by scanning specific IPs. It checks if the OpenSSH version is affected by CVE-2023-48795
Readme
# OpenSSH Vulnerability Scanner for CVE-2023-48795

This Python-based tool scans systems for OpenSSH installations and checks if they are vulnerable to **CVE-2023-48795**, a critical vulnerability that affects versions earlier than **OpenSSH 9.6**. The script provides a detailed report of the scanned systems, including recommendations for upgrading if vulnerabilities are found.

---

## CVE-2023-48795: Vulnerability Overview

- **CVE ID**: CVE-2023-48795
- **Description**: A vulnerability in OpenSSH before version 9.6 could allow remote attackers to bypass security mechanisms or execute unauthorized actions.  
- **Solution**: Upgrade to **OpenSSH version 9.6 or later**.

---

## Features

- Detects and checks OpenSSH and SSHD versions on specified IPs.
- Supports both single IP scans and bulk scans from a file.
- Multi-threaded for efficient scanning of multiple hosts.
- Automatically downloads and installs missing `which`, `ssh`, or `sshd` binaries.
- Saves results in a randomly named JSON file for easy reference.
- Color-coded and bold output for clear vulnerability status reporting.

---

## Requirements

- Python 3.x
- Internet access (for downloading dependencies and OpenSSH binaries if necessary)
- `pip` (for dependency management)

### Dependencies

- **colorama**: Provides colorful terminal output.
- **termcolor**: Adds color formatting for text.

These dependencies are automatically installed when running the script.

---

## Installation

Clone the repository:

```bash
git clone https://github.com/TrixSec/CVE-2023-48795.git
cd CVE-2023-48795
```

---

## Usage

Run the script with the following options:

### Scan a Single IP

```bash
python CVE-2023-48795.py --ip <IP_ADDRESS>
```

Example:
```bash
python CVE-2023-48795.py --ip 192.168.1.10
```

### Scan Multiple IPs from a File

```bash
python CVE-2023-48795.py --ip <PATH_TO_FILE>
```

Example:
```bash
python CVE-2023-48795.py --ip ips.txt
```

You will be prompted to enter the number of threads for scanning.

---

## Output

Results are saved in the `output` directory with a randomly generated file name (e.g., `123456.json`).  
The file contains information about each scanned IP and its vulnerability status.

Example result:

```json
[
    {
        "ip": "192.168.1.10",
        "ssh_version": 9.5,
        "sshd_version": 9.5,
        "status": "Vulnerable"
    },
    {
        "ip": "192.168.1.15",
        "ssh_version": 9.6,
        "sshd_version": 9.6,
        "status": "Safe"
    }
]
```

---

## Disclaimer

Use this tool responsibly and only on systems you own or have permission to test. Unauthorized scanning of external systems may violate laws and policies.


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[4.0K] /data/pocs/9f272f77ff74c8c422a66f994e1ca663dd246adf ├── [6.0K] CVE-2023-48795.py ├── [ 34K] LICENSE └── [2.7K] README.md 0 directories, 3 files
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