A 19-year-old vulnerability has been re-discovered in the RSA implementation from F5, Citrix, and Cisco. The ROBOT attack is nothing but a couple of minor variations to the oldon the RSA encryption protocol. The attack allows an attacker to perform RSA decryption and cryptographic operations using the private key configured on the vulnerable TLS servers. Some of the most popular websites on the Internet, including Facebook and Paypal, are affected by the vulnerability. The researchers have also released a python tool to scan for vulnerable hosts.
Source: https://thehackernews.com/2017/12/bleichenbacher-robot-rsa.html