Weak SSL/TLS Configuration
Servers using outdated TLS versions (TLS 1.0/1.1), weak cipher suites, or misconfigured certificates are vulnerable to eavesdropping, man-in-the-middle attacks, and protocol downgrade attacks.
Overview
SSL/TLS protects data in transit between clients and servers. Misconfigurations such as supporting deprecated protocols (SSLv3, TLS 1.0/1.1), weak cipher suites (RC4, DES, 3DES), missing HSTS headers, or improperly configured certificates create opportunities for attackers to intercept and decrypt communications.
Types & Variants
Protocol Downgrade
Forcing the connection to use an older, vulnerable protocol version.
Weak Cipher Exploitation
Exploiting weak cipher suites like RC4 or export ciphers.
Certificate Issues
Self-signed, expired, or hostname-mismatched certificates.
Impact
Traffic interception, credential theft, data eavesdropping, man-in-the-middle attacks, compliance violations.
Remediation
Enforce TLS 1.2+ (preferably TLS 1.3), disable weak ciphers, use strong key exchange algorithms, implement HSTS, and regularly test SSL/TLS configuration.
Enforce TLS 1.3 (minimum TLS 1.2)
Disable all weak cipher suites (RC4, DES, 3DES, export ciphers)
Enable HSTS with includeSubDomains and preload
Use certificates from trusted Certificate Authorities
Implement certificate pinning for mobile applications
Test configuration regularly with tools like SSL Labs
Related SuperClue scanner checks
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