Bug 52746

Summary: useradd -p doesn't hash passwords in /etc/shadow
Product: [Retired] Red Hat Linux Reporter: Need Real Name <jst3290>
Component: shadow-utilsAssignee: Peter Vrabec <pvrabec>
Status: CLOSED NOTABUG QA Contact: David Lawrence <dkl>
Severity: low Docs Contact:
Priority: medium    
Version: 7.1   
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2005-09-26 13:03:40 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Need Real Name 2001-08-28 17:55:37 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows 95; 
DNAUU234ENU01PCP)

Description of problem:
I noticed that creating a user with 'useradd' and the '-p' option (which 
gives the new user a default password) does not hash the password 
in /etc/shadow:


root@hogs /# useradd -p h4x0r lordspankatron
root@hogs /# tail -2 /etc/shadow
johnnyuser:$1$JiUjVlWa$gnfXvKsHUxnjoIPGmkt/1.:11562:0:99999:7:-1:-
1:2147482240
lordspankatron:h4x0r:11562:0:99999:7:::



This bug doesn't seem exploitible for two reasons:

    1.)  The user cannot log in with the supplied password because
MD5( password_supplied_at_login_prompt ) != 
unhashed_password_in_shadow_file
    2.)  /etc/shadow exists in mode 0400, so no one besides the super-user 
can read it anyway.


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.  useradd -p aDefaultPassword aNewUser
2.  tail -1 /etc/shadow
3.  Look at the password field.
	

Actual Results:  The password is not hashed -- it is stored in plain-text.

Expected Results:  The password should have been hashed.

Additional info:
Comment 1 Paul W. Frields 2001-08-31 12:48:21 UTC 
This doesn't really seem like a bug; useradd states in the man page that it 
expects the crypt(3) or MD5-hash returned string as an argument to the -p 
option, not the password in plaintext.  RTFM.