Bug 853

Summary:	PAM auth needs ChallengeResponseAuthentication enabled
Product:	Portable OpenSSH	Reporter:	Luiz <leg>
Component:	PAM support	Assignee:	OpenSSH Bugzilla mailing list <openssh-bugs>
Status:	CLOSED FIXED
Severity:	minor
Priority:	P5
Version:	3.8.1p1
Hardware:	All
OS:	Linux
Bug Depends on:
Bug Blocks:	822

Description Luiz 2004-04-29 02:49:47 AEST

With "ChallengeResponseAuthentication no" on sshd_config, PAM authentication is
completely disabled. 
Most users won't realize it because sshd fallbacks to shadow auth, but aditional
restrictions on PAM conf will not work.  You can confirm this behavior by
enabling/disabling ChallengeResponseAuthentication and requiring pam_deny.so for
sshd auth. 

It was working on versions up to 3.7.1p2

Comment 1 Damien Miller 2004-04-29 07:46:46 AEST

Additional PAM restrictions are still enabled, just not the PAM "password"
restrictions. I.e. account and session controls are still enforced.

Besides, the comment for UsePAM in sshd_config is fairly clear (though not
completely explicit):

# Set this to 'yes' to enable PAM authentication (via challenge-response)
# and session processing. Depending on your PAM configuration, this may
# bypass the setting of 'PasswordAuthentication' and 'PermitEmptyPasswords'

Comment 2 Darren Tucker 2004-06-29 12:42:09 AEST

This has been fixed, the development snapshots have SSH password authentication
via PAM too (using a "blind" conversation function).  This will be in the next
major release (ie 3.9x).

Please try a snapshot:
ftp://ftp.ca.openbsd.org/pub/OpenBSD/OpenSSH/portable/snapshot/
and re-open this bug if the problem is not resolved.