Solaris 10 allow ssh login with empty passwd


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# 1  
Solaris 10 allow ssh login with empty passwd

I have turned off PermitEmptyPasswords in sshd_config, but a user with empty passwd (deleted by passwd -d user) can still login without password, why? it is big security concern, linux doesn't have the issue.


Code:
 
$ uname -a
SunOS  5.10 Generic_118855-14 i86pc i386 i86pc
 
$/etc/ssh/sshd_config
PermitEmptyPasswords no

# 2  
You likely forgot to have the configuration file read again by the daemon:
Code:
svcadm restart ssh

# 3  
Quote:
Originally Posted by jlliagre
You likely forgot to have the configuration file read again by the daemon:
Code:
svcadm restart ssh

sshd has been restarted, this sympthom exists on many hosts, I think it is Solaris weird default behaviour.
# 4  
Go to the user's home directory in the server.
Go to .ssh directory
Delete the authorized_keys file.
# 5  
Quote:
Originally Posted by sundar63
Go to the user's home directory in the server.
Go to .ssh directory
Delete the authorized_keys file.
it was not authenticated by ssh key, ssh -vv showed it succeeded by keyboard interactive.
# 6  
If PASSREQ macro in /etc/default/login is set to YES, then a user cannot have blank password.
# 7  
Quote:
Originally Posted by honglus
sshd has been restarted, this sympthom exists on many hosts, I think it is Solaris weird default behaviour.
I reproduced the issue on Solaris 10 update 4. It looks like a bug so might already be fixed in a patch. In any case, the same setting works as expected with OpenSolaris.
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