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TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA

Breakdown of the TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA cipher suite

Cyber Security Rating for TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA - D

B

Key Exchange Mechanism

Diffie Hellman-DH

Static Diffie Hellman (DH) does not use emphemeral (temporary) keys, meaning it violates perfect forward secrecy. Ephemeral Diffie Hellman (EDH) should be used instead.

D

Cipher

Data Encryption Standard (40 Bit)-DES40

DES should not be used in cipher suites due to its weak key, making it highly vulnerable to brute-force attacks. Modern standards require stronger encryption, and DES's vulnerabilities compromise security, making it unsuitable for protecting sensitive data in contemporary applications.

D

Hash

Secure Hash Algorithm-SHA

Chosen prefix attacks for SHA1 are feasible at an accessible cost to a well-funded adversary. This level of expense, while significant, does not pose a substantial barrier to attackers with sufficient resources, making such attacks a credible threat.

D

Cipher Mode

Cipher Block Chaining-CBC

Cipher Block Chaining (CBC) mode is vulnerable to the Lucky13 and POODLE (in TLS v1.2 and below) attacks. The Lucky13 attack exploits timing discrepancies in padding validation, allowing attackers to gradually reveal plaintext. The POODLE attack leverages padding errors to decrypt ciphertext by repeatedly modifying and sending it to the server, observing the error responses. These vulnerabilities arise from CBC's handling of padding and error messages, making it less secure than modern encryption modes like Galois/Counter Mode (GCM), which offer stronger integrity and confidentiality guarantees.

Web infrastructure owners must ensure they only allow secure cipher suites to protect against potential security threats. Cipher suites determine the encryption algorithms and key exchange mechanisms used in HTTPS connections. Insecure cipher suites can leave data vulnerable to interception, decryption, and manipulation by malicious actors. By restricting to secure cipher suites, owners mitigate risks such as data breaches, unauthorized access, and compromise of sensitive information. This proactive measure helps maintain trust with users, ensures compliance with security standards, and safeguards the integrity and confidentiality of data transmitted over the web.
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