The 389 Directory Server's implementation of PBKDF2-SHA256 password verification uses a non-constant-time comparison function (memcmp()) for password hashes. This flaw allows a remote attacker to perform timing analysis on LDAP bind attempts to potentially glean partial information about password hashes. However, the practical exploitation of this vulnerability is highly challenging because PBKDF2's computational cost significantly limits the speed of such attacks.

An attacker could remotely measure timing differences during LDAP bind attempts to infer partial password hash information. This could potentially weaken the confidentiality of password hashes. There is no indication of impact on integrity or availability. The difficulty of exploitation due to PBKDF2's computational overhead reduces the practical risk.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider monitoring for unusual LDAP bind activity and applying any recommended vendor mitigations once published.