A new vulnerability (CVE-2025-27482) discovered in the Remote Desktop Gateway Service that allows unauthorized attackers to execute code over a network by exploiting sensitive data storage in improperly locked memory. The Remote Desktop Gateway Service provides a secure, encrypted connection between remote users and internal network resources through the internet. It plays a vital role in enabling remote access for employees and businesses alike. In this post, we'll explore and explain the details of the vulnerability, its impact, and the mitigation steps you can take to protect your systems.

Description

Remote Desktop Gateway Service (RD Gateway) is a widely used service that enables remote users to securely access internal network resources without opening a direct connection from the internet. It facilitates communication between remote desktop clients and remote desktop servers by encapsulating Remote Desktop Protocol (RDP) traffic with HTTP Secure (HTTPS) Protocol.

The vulnerability CVE-2025-27482 recently discovered in the RD Gateway Service allows unauthorized attackers to exploit sensitive data storage in improperly locked memory. This vulnerability can be exploited over a network and enable an attacker to execute arbitrary code on the affected system.

Exploit Details

An attacker gains unauthorized access to sensitive data stored in improperly locked memory in the RD Gateway Service by sending specially crafted requests to the target system. These crafted requests exploit a flaw in the way the RD Gateway handles and locks the memory for storing sensitive data, resulting in information leakage.

As a part of the crafting process, an attacker could use a code snippet like the following

import requests

target_url = "https://TARGET_HOST/RDWeb";
payload = '''PAYLOAD_PLACEHOLDER'''

headers = {
    'Content-Type': 'application/x-www-form-urlencoded'
}

response = requests.post(target_url, data=payload, headers=headers)

print(response.status_code)

By replacing the TARGET_HOST with the target server's hostname or IP address and the PAYLOAD_PLACEHOLDER with the exploit payload, the attacker sends a malicious request that can trigger the memory leak vulnerability.

Original References

The Common Vulnerabilities and Exposures (CVE) Program has assigned the CVE-ID CVE-2025-27482 to this vulnerability. More information can be found in the National Vulnerability Database (NVD) entry for this vulnerability.

Mitigation

Administrators are recommended to take the following steps to mitigate the risk associated with this vulnerability:

1. Update your RD Gateway Service to the latest version, as this issue might be fixed in a future release or security patch provided by the vendor.
2. Implement network segmentation and restrict network access to the RD Gateway server by allowing only trusted IP addresses and user groups.
3..Enable monitoring and logging for anomalous activity on the RD Gateway server, which could be indicative of exploitation attempts.
4. Perform regular assessments and security audits of the RD Gateway service to identify any configuration issues or vulnerabilities that may exist.

Conclusion

CVE-2025-27482 is a critical vulnerability that affects the Remote Desktop Gateway Service by allowing unauthorized attackers to execute code over a network due to sensitive data storage in improperly locked memory. By understanding the exploit details, reviewing the original references, and implementing the recommended mitigation steps, organizations can effectively protect their systems from potential attacks.

Timeline

Published on: 04/08/2025 18:15:58 UTC
Last modified on: 04/30/2025 17:14:24 UTC