Bugtraq mailing list archives
Re: Strengthen OpenSSH security?
From: Theo de Raadt <deraadt () cvs openbsd org>
Date: Thu, 20 Apr 2006 19:15:30 -0600
It seems to me that sshd should not tip its hand by returning different responses when a user ID can be used for logins than when it can't -- allowing an attacker to focus password guessing attacks on user IDs with which it would have a chance of gaining access. For those folks out there who are more familiar with OpenSSH than I am: How hard would it be to make the responses indistinguishable?Are you running the latest version of portable OpenSSH? If not, you need to upgrade. As far as I know, there should be no more leaks of this sort in the current code. If there are, please notify the openssh developers (and include your authentication configuration - your PAM modules may be leaking the info, and there's nothing OpenSSH can do about that).
He's right. If there are still problems with leakage, it is due to PAM. And we can't do anything about it. I will try to be as nice as anyone has ever seen me be: PAM is completely and utterly broken and cannot be fixed.
Current thread:
- Strengthen OpenSSH security? Brett Glass (Apr 19)
- Re: Strengthen OpenSSH security? Mike Hoskins (Apr 20)
- Re: Strengthen OpenSSH security? Carson Gaspar (Apr 20)
- Re: Strengthen OpenSSH security? Theo de Raadt (Apr 21)
- Re: Strengthen OpenSSH security? Kd (Apr 20)
- Re: Strengthen OpenSSH security? MaddHatter (Apr 20)
- Re: Strengthen OpenSSH security? Damien Miller (Apr 20)
- Re: Strengthen OpenSSH security? c0redump (Apr 20)
- <Possible follow-ups>
- Re: Strengthen OpenSSH security? Bob Goodman (Apr 23)