The Top Threats of Exposing RDP to the Open Internet

Remote Desktop Protocol (RDP) is a critical tool for many businesses, enabling remote access to systems and networks. However, exposing RDP to the open internet presents significant security risks. Threat actors frequently target RDP due to its widespread use and potential vulnerabilities. In 2022, security research showed that over 37% of all traffic from threat actors was RDP-related. This article explores the top threats associated with internet-exposed RDP, common vulnerabilities, and effective mitigation strategies.

Key Takeaways

• Exposing RDP to the open internet significantly increases the risk of cyberattacks, including brute force attacks and credential stuffing.
• Unpatched RDP servers and unrestricted port access can be exploited by threat actors to move laterally within networks and bypass sign-in credentials.
• Implementing VPNs, using multi-factor authentication, and regularly updating and patching systems are essential strategies for securing RDP.

Security Risks Associated with Internet-Exposed RDP

Brute Force Attacks

One of the most significant risks of exposing RDP to the internet is the susceptibility to brute force attacks. Attackers can relentlessly attempt various username and password combinations until they gain access. This method is particularly effective against weak or commonly used passwords, making it a straightforward yet dangerous threat.

Credential Stuffing

Credential stuffing is another prevalent risk. In this scenario, attackers use lists of compromised credentials from other breaches to gain unauthorized access to RDP servers. Given the frequency of data breaches, many users often reuse passwords across multiple platforms, making this attack vector alarmingly effective.

Unrestricted Port Access

Leaving RDP ports open to the internet is akin to leaving your front door unlocked. It invites unwanted attention from cybercriminals who continuously scan for open ports to exploit. This unrestricted access can lead to unauthorized entry and potential compromise of the entire network.

The fundamental problem with internet-exposed instances of RDP is the signal it sends to threat actors. Hackers know that RDP is an essential part of many business processes, making it a prime target.

Common Vulnerabilities in RDP Servers

Bypassing RDP Sign-In Credentials

One of the most alarming vulnerabilities in RDP servers is the ability for attackers to bypass sign-in credentials. This can occur through various means, such as exploiting weak passwords or leveraging known vulnerabilities like CVE-2018-0886. Once inside, attackers can gain unauthorized access to sensitive systems and data.

Lateral Movement within Networks

After gaining initial access, attackers often use RDP to move laterally within a network. This means they can explore and compromise other systems connected to the same network. This type of movement is particularly dangerous because it can lead to widespread damage and data breaches.

Exploitation of Unpatched Systems

RDP servers that are not regularly updated and patched are prime targets for exploitation. Vulnerabilities like BlueKeep (CVE-2019-0708) have shown how devastating unpatched systems can be. Attackers can easily exploit these weaknesses to gain control over the entire server, leading to significant security incidents.

It's crucial to understand that leaving RDP servers exposed to the internet is a recipe for disaster. The risks far outweigh any potential convenience.

Mitigation Strategies for Securing RDP

Implementing VPNs

One of the most effective ways to secure Remote Desktop Protocol (RDP) is by implementing a Virtual Private Network (VPN). By doing so, you add an extra layer of security, ensuring that only authenticated users can access the RDP server. This method not only helps in restricting unauthorized access but also provides a secure tunnel for data transmission, reducing the risk of man-in-the-middle attacks.

Using Multi-Factor Authentication

Another crucial strategy is the use of Multi-Factor Authentication (MFA). By requiring more than just a password to access the RDP server, you significantly increase the difficulty for attackers to gain entry. MFA can include something you know (password), something you have (a mobile device), or something you are (biometrics). This layered approach makes it much harder for cybercriminals to compromise your system.

Regularly Updating and Patching Systems

Keeping your systems up-to-date is fundamental in protecting against vulnerabilities. Regularly updating and patching your RDP servers ensures that any known security flaws are addressed promptly. This practice is essential in mitigating the risks associated with unpatched systems, which are often targeted by attackers. Make it a routine to check for updates and apply patches as soon as they are released.

Implementing robust data backups and security measures can mitigate the risks associated with exposing RDP to the open internet.

Securing Remote Desktop Protocol (RDP) is crucial in preventing unauthorized access and potential cyber-attacks. Implementing robust mitigation strategies can significantly reduce the risk of vulnerabilities. For a comprehensive guide on securing RDP and to utilize our free RDP checker tool, visit our website today.

Frequently Asked Questions

Why is internet-exposed RDP risky?

The fundamental problem with internet-exposed instances of RDP is the signal it sends to threat actors. Hackers know that RDP is an essential part of many business processes, making it a prime target. In 2022, Coalition security research showed that over 37% of all traffic from threat actors was RDP-related.

What are the main vulnerabilities of RDP servers?

Threat actors can exploit internet-exposed RDP in several ways. The riskiest vulnerabilities allow criminals to bypass RDP sign-in credentials or compromise unrestricted port access, gaining the ability to move laterally within a network. Leaked RDP login details can also be used to perform brute force or credential-stuffing attacks.

How can businesses secure RDP access?

Businesses should remove RDP from the public internet to decrease the risk of being targeted by cybercriminals. Implementing VPNs, using multi-factor authentication, and regularly updating and patching systems are effective strategies to secure RDP access.