Replay Attack Vulnerability in SSH 2.0 with RC4 Encryption and Disallowed NULL Passwords

CVE-2001-1476 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions of user passwords by replaying user sessions with certain modifications, which trigger different messages depending on whether the guess is correct or not.

Learn more about our User Device Pen Test.