Logjam common primes

The logjam is a security vulnerability against a Diffie–Hellman key exchange. It ranges from 512-bit to 1024-bit keys. It was publicly reported on May 20, 2015, by a group of scientists. This server support is vulnerable to DHE_EXPORT and thus this server is vulnerable to Logjam attack. This type of attack allows a man in the middle attacker to downgrade vulnerable TLS connections to 512-bit export grade cryptography. This allows the attacker to read and modify any data passed over the connection.

Impact

Using this vulnerability, an attacker can:-

• perform Man-in-the-middle (MITM)attack
• read and modify data passed over the connection

Mitigation / Precaution

Beagle recommends the following fixes:-

• disable support for export cipher suites
• use a 2048-bit Diffie-Hellman group

Written by

Sooraj V Nair

Cyber Security Engineer