PART THREE OF THREE
Users should not share or transmit confidential information, such as personal data, medical information, financial records, proprietary source code, or credit card details, via email without proper authorization and oversight. Notably, this holds particular significance in light of various data protection regulations, such as CCPA and GDPR. Nonetheless, there are instances where employees may accidentally send such information due to inattentiveness, and some may do so intentionally. Therefore, every organization needs to establish comprehensive, system-wide data protection measures that extend to email communication.
One such measure is email masking. It is a long-standing feature, commonly referred to as email aliases, which enhances the privacy and security of your email communication. In particular, this feature generates a randomized email address to obscure your actual email address when setting up an online account. Subsequently, any messages sent to the concealed email address are automatically forwarded to your primary inbox. Notably, the sender remains unaware of the ultimate destination of the email, and they can only determine it if you accidentally respond to a message using your primary account.
Email masking offers dual advantages. First and foremost, it enhances your privacy. Specifically, the more you employ distinct masked email addresses, ideally one for each online account, the more you reduce the potential risks associated with information leakage in the event of a data breach. These masked email addresses cannot be used as login IDs on other websites or for password resets. Furthermore, malicious actors cannot hijack the masked email address as they would with a legitimate account. Essentially, they function solely as forwarding addresses, and they are disposable.
The Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) have jointly issued reports to caution on-premise Exchange users regarding how malicious cyber actors have been actively employing zero-day exploits to infiltrate on-premises Microsoft Exchange servers. Importantly, these threat actors possess the capability to pilfer credentials and mailbox data, which contain and transmit sensitive data, including financial data, proprietary information, and personally identifiable information (PII).
In addition, an entirely different set of vulnerabilities in Exchange, which were recently discovered and actively exploited, remain unpatched. Researchers have demonstrated that Microsoft's initial efforts to address these flaws were unsuccessful. These vulnerabilities represent the latest in a series of security issues that have afflicted Exchange's code over the years.
Furthermore, even when Microsoft does release patches for Exchange, they often go unimplemented due to the labor-intensive technical process required for installation. Consequently, many who have observed the growing security challenges associated with running an Exchange server are left with a clear message: An Exchange server poses a security risk requiring robust security measures to maintain data privacy and security.
Moreover, the challenge faced by email administrators in maintaining fully patched On-premise Exchange servers can be traced back to the difficulties in installing Exchange updates. Essentially, this complexity emerges from the age of its underlying code and the potential risks linked to modifying interdependent mechanisms within the software, which can disrupt its functionality.
To illustrate, security researcher Kevin Beaumont shared his personal experience on Twitter while updating an On-premise Exchange email server. He documented numerous issues, crashes, and hiccups during the process. Despite the server having received an update just a few months prior, the update process took nearly three hours to complete.
In light of these challenges, email masking for on-premise Exchange servers is necessary to protect sensitive data from unauthorized access. Email masking provides a critical layer of security for businesses. It serves as a safeguard against ever-evolving cyber threats. Besides, in an era where cyber actors frequently exploit vulnerabilities in these servers, the need for enhanced protection cannot be underscored.
Email masking plays a pivotal role by obfuscating email addresses, introducing substantial challenges for malicious actors seeking to launch phishing attacks or compromise sensitive data. This additional security measure serves as a bulwark, ensuring data privacy and defending against unauthorized access to valuable information.
Step 1: Plan Your Email Masking Strategy
Step 2: Create Alias Email Addresses
Step 3: Update Email Address Policies
Step 4: Configure Outbound Email Address Rewriting
Step 5: DNS Configuration
Step 6: Testing and Verification
Step 7: Security and Access Control
Step 8: Monitoring and Logging
Step 9: User Training and Education
Step 10: Backup and Recovery
Establish a robust backup and recovery strategy to safeguard your Exchange Server configuration. Regularly back up configurations and email data to ensure you can recover from unexpected issues.
Step 11: Documentation
Create comprehensive documentation of your email masking setup. Include configurations, policies, and any custom scripts or settings applied. This documentation will be valuable for reference and future maintenance.
Step 12: Regular Maintenance
Continuously monitor and update your email masking solution as needed. Stay current with Exchange Server updates and security patches to maintain a secure and functional system.
Pulsar Security's experts assume a crucial role in enabling the successful implementation of email masking on on-premises Exchange servers. Firstly, they conduct comprehensive assessments of the existing email infrastructure to pinpoint vulnerabilities and potential points of exposure. This involves gaining an understanding of the organization's specific needs and potential risks, enabling them to recommend customized email masking solutions that align with the company's distinct security requirements.
Secondly, our security professionals take charge of deploying and configuring email masking tools, ensuring their seamless integration with the current Exchange server environment. They establish appropriate policies and guidelines for creating and managing masked email aliases, thereby minimizing the risk of configuration errors. Furthermore, these experts provide training to both IT teams and end-users, ensuring that they comprehend the significance of email masking and possess the necessary skills to use it effectively. Continuous monitoring and maintenance of email masking solutions, along with proactive threat assessments, contribute to an organization's overall security posture. Luckily, experts constantly adapt and refine these measures to address evolving threats and maintain the efficacy of email masking to safeguard sensitive data and thwart cyber attacks.