Debian: DSA-5599-1: phpseclib security update

Fabian Baeumer, Marcus Brinkmann and Joerg Schwenk discovered that the SSH protocol is prone to a prefix truncation attack, known as the "Terrapin attack". This attack allows a MITM attacker to effect a limited break of the integrity of the early encrypted SSH transport

attack attacker debian dsa effect encrypted integrity marcus marcus brinkmann mitm protocol security security update ssh ssh protocol terrapin terrapin attack transport update