What is a SSL vulnerability?
Heartbleed bug is a vulnerability in the OpenSSL, a popular open source cryptographic library that helps in the implementation of SSL and TLS protocols. This bug allows attackers to steal private keys attached to SSL certificates, usernames, passwords and other sensitive data without leaving a trace.
Is Diffie-Hellman weak?
Diffie-Hellman key exchange is a popular cryptographic algorithm that allows Internet protocols to agree on a shared key and negotiate a secure connection….Who is Affected?
| Vulnerable if most common 1024-bit group is broken | |
|---|---|
| SSH — IPv4 Address Space | 25.7% |
| IKEv1 (IPsec VPNs) — IPv4 Address Space | 66.1% |
What is SSL Diffie-Hellman modulus?
Description : The remote host allows SSL/TLS connections with one or more Diffie-Hellman moduli less than or equal to 1024 bits. Through cryptanalysis, a third party may be able to find the shared secret in a short amount of time (depending on modulus size and attacker resources).
What attacks are possible on Diffie-Hellman?
In this attack, the attacker tries to stop the communication happening between sender and receiver and attacker can do this by deleting messages or by confusing the parties with miscommunication. Some more attacks like Insider attack, Outsider attack, etc are possible on Diffie-Hellman.
What is the freak vulnerability?
In essence, the FREAK vulnerability allows hackers to gain access to a website’s private key by intercepting HTTPS connections between clients and vulnerable servers. This, in turn, means they can decrypt login cookies, passwords, credit card information, and other vulnerable data from HTTPS connections.
Does Diffie-Hellman provide integrity?
Oracle Advanced Security uses the well known Diffie-Hellman key negotiation algorithm to perform secure key distribution for both encryption and data integrity.
Is TLS 1.2 vulnerable to Sweet32?
The SWEET32 (Birthday Attack) is a Medium level vulnerability which is prevalent in TLS 1.0 and TLS 1.1 which support 3DES Encryption. To resolve this issue you should deploy TLS 1.2 as a minimum (the 3DES cypher is dropped by default) and disable vulnerable ciphers.
What ciphers are vulnerable to Sweet32?
THREAT: Legacy block ciphers having block size of 64 bits are vulnerable to a practical collision attack when used in CBC mode. protocol support cipher suites which use DES, 3DES, IDEA or RC2 as the symmetric encryption cipher are affected.