CVE-2022-32203: Command Injection Vulnerability in Huawei Terminal Printer Product

In this post, we will be discussing a recently discovered command injection vulnerability in the Huawei terminal printer product. The vulnerability has been assigned a Common Vulnerability and Exposures (CVE) ID: CVE-2022-32203. Successful exploitation of this vulnerability could result in the highest privileges of the printer, which can lead to unauthorized access, data breaches, and other security risks. This issue has been officially reported by Huawei with Vulnerability ID: HWPSIRT-2022-51773.

!Huawei Terminal Printer

What is Command Injection?

Command injection is a type of vulnerability that allows an attacker to execute arbitrary commands on the target system. This can happen when an application fails to properly validate and sanitize user input before using it to run system commands. As a result, a malicious user can craft input that ends up being executed as code on the system with the same privileges as the application. This poses a significant security risk, as it can lead to unauthorized access and control of the affected system.

CVE-2022-32203: The Vulnerability in Huawei Terminal Printer

The vulnerability in the Huawei terminal printer is due to insufficient validation of certain input parameters passed to system command executions. An attacker can exploit this flaw by crafting a malicious input, which, when processed by the affected printer, could lead to the execution of arbitrary system commands with the highest level of privileges.

The code snippet below demonstrates the vulnerable part of the affected Huawei terminal printer's code:

import subprocess

def run_command(command):
    return subprocess.check_output(command, shell=True)

def print_document(document):
    command = f'lp -d printername {document}'
    run_command(command)

# ...

# User-supplied document_name
document_name = "malicious_document; rm -rf /"
print_document(document_name)

In the example above, run_command utilizes subprocess.check_output() with the shell=True parameter, which allows for the possibility of command injection. The print_document function takes a user-supplied document name and passes it to run_command without proper validation and sanitization. As a result, a malicious user could provide a document name containing additional system commands, which would be executed by the affected printer with the highest privileges.

Original References and Exploit Details

For more information about the CVE-2022-32203 vulnerability and its impact, please refer to the following resources:

1. Huawei Security Notice: Command Injection Vulnerability in Terminal Printer Products
2. CVE Entry: CVE-2022-32203

As of now, Huawei has not released patches or updates for the affected terminal printer products. It is important for users to monitor for any released patches or updates from Huawei and apply them immediately. In the meantime, organizations should implement strict input validation and sanitization for any data that can be processed by the affected printer products.

Conclusion

CVE-2022-32203 is a critical command injection vulnerability in Huawei's terminal printer product. If exploited, it can allow an attacker to run arbitrary system commands with the highest privileges, leading to unauthorized access and control of the affected system. Users are urged to monitor for patches or updates from Huawei and apply them as soon as possible to protect their systems from potential attacks.

Timeline

Published on: 12/20/2024 01:54:16 UTC