Уязвимость функции toremote средства криптографической защиты OpenSSH, позволяющая нарушителю выполнить произвольную команду

Уязвимость средства криптографической защиты OpenSSH, связанная с отсутствием защиты служебных данных, позволяющая нарушителю раскрыть защищаемую информацию

The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.

scp in OpenSSH through 8.3p1 allows command injection in the scp.c toremote function, as demonstrated by backtick characters in the destination argument. NOTE: the vendor reportedly has stated that they intentionally omit validation of "anomalous argument transfers" because that could "stand a great chance of breaking existing workflows."