Introduction/ Issue:
Organizations store and transmit sensitive information, including user credentials, employee records, financial data, system configurations, and vulnerability reports. If this information is not adequately protected, attackers may access or misuse it.
Encryption converts readable data, called plaintext, into an unreadable format called ciphertext. Decryption converts it back into readable information using the correct cryptographic key.
Missing, weak, or incorrectly configured encryption is a significant security issue that should be identified and addressed through vulnerability management.
Why We Need to Address It / Cause of the Issue:
Encryption-related vulnerabilities commonly occur when:
- Applications use HTTP instead of HTTPS.
- Servers support outdated SSL or TLS protocols.
- Weak encryption algorithms or cipher suites are enabled.
- Certificates are expired or incorrectly configured.
- Databases, files, and backups are not encrypted.
- Encryption keys are exposed, hard-coded, or poorly managed.
- Passwords are protected using weak hashing methods.
If attackers exploit these weaknesses, they may access confidential information, compromise user accounts, damage the organization’s reputation, or cause compliance violations.
Encryption adds an important security layer by making stolen or intercepted data unreadable without the correct key. However, it should complement—not replace—patching, vulnerability scanning, access controls, and secure configurations.
How Do We Solve It?
Organizations should include encryption checks in their vulnerability-management process:
- Identify sensitive data: Classify credentials, personal information, financial records, application data, backups, and security reports.
- Perform vulnerability scanning: Check for HTTP connections, outdated TLS versions, weak cipher suites, expired certificates, exposed keys, and unencrypted storage.
- Encrypt data in transit: Use HTTPS with valid certificates, enable TLS 1.2 or TLS 1.3, and disable outdated SSL and TLS protocols.
- Encrypt data at rest: Protect sensitive information stored in databases, servers, devices, and backups using approved encryption standards.
- Secure encryption keys: Store keys separately from encrypted data, restrict access, rotate them regularly, and never hard-code them in application source code.
- Validate remediation: Perform a follow-up vulnerability scan to confirm that the identified weaknesses have been resolved.
Real-Time Example
During a routine vulnerability assessment, an internal web application was found to be accessible over HTTP and supported an outdated TLS protocol. This could allow login and session information to be intercepted.
To resolve the issue, a valid certificate was installed, HTTPS was enabled, HTTP traffic was redirected to HTTPS, and outdated protocols and weak cipher suites were disabled. TLS 1.2 and TLS 1.3 were enabled, and the encryption keys were moved to a secure, access-controlled location.
A follow-up scan confirmed that the application used a secure encrypted connection and no longer supported outdated protocols.
Conclusion
Encryption and decryption are essential for protecting sensitive information in transit and at rest. In this scenario, enabling HTTPS, using supported TLS protocols, removing weak configurations, and securing encryption keys effectively reduced the risk of data exposure.
Encryption should be combined with regular vulnerability scanning, timely patching, strong access controls, and continuous monitoring to build an effective cybersecurity program.
