The Browser Exploit Against SSL/TLS (BEAST) is a vulnerability that exists in all cipher block chaining (CBC) ciphers in SSL V3/TLS 1.0 and it’s lower versions. Ciphers are cryptographic algorithms used for performing encryption/decryption of communication channel. The BEAST attack targets the weak points in cipher block chaining to exploit the SSL/TLS protocol. This vulnerability targets the Secure Socket Layer to retrieve information from the communication between the server and the browser. This vulnerability can also access the authentication tokens of the user. The BEAST attack targets the confidentiality feature of HTTPS connection. This attack helps the attacker to extract unencrypted plaintext data from an encrypted channel.
The conditions for a successful beast attack are:-
Using this vulnerability, an attacker can:-
Beagle recommends the following fixes:-