Documents for accounts

Code [acc001w]

The listed login ID is disabled in some manner ('*' in passwd field, etc), but the login shell for the login ID is a valid shell (from /etc/shells or the system equivalent). A valid shell can potentially enable the login ID to continue to be used. The login shell should be changed to something that doesn't exist, or to something like /bin/false.

Code [acc002i]

The listed login ID is disabled, but has a potentially valid shell. These can usually be safely ignored.

Code [acc003w]

The listed login ID is disabled in some manner ('*' in passwd field, etc), but the .forward file is setup to execute programs. This can allow the login ID to continue to be used despite the fact that it is disabled. The .forward file should be checked and probably removed.

Code [acc004w]

The listed login ID is disabled in some manner ('*' in passwd field, etc), but a non-zero length .rhosts file. This can allow the login ID to continue to be used. Unless this has been specifically set up to provide some service, it should be removed.

Code [acc005w]

The listed login ID is disabled in some manner ('*' in passwd field, etc), but has a 'cron' file or 'cron' entries. This allows commands to be executed on behalf of the login ID, potentially allowing access to the login ID. These should be removed unless specifically set up to provide a service.

Code [acc006w]

The home directory of the listed login ID has group write permission, world write permission or both enabled. This allows new files to be added (and existing files potentially removed) by others. The write permissions should be removed.

Code [acc007a]

The listed login ID has a '.hushlogin' file which is not zero-length. This file is normally a zero length file. This file is frequently used by intruders as a place to store captured passwords. This file should be looked at. If it appears to be such a log file, then the system should be regarded as being compromised. The system should be thoroughly checked and cleaned.

Code [acc008w]

The listed login ID has a configuration file which has group write permission, word write permission, or both enabled. This allows others to change this file, compromising the login ID.

Code [acc009a]

The login ID 'sync' has no password and the shell is not /bin/sync, which is what it normally is. This could indicate an intrusion has occurred. If the shell is one of the normal shells (/bin/sh, /bin/csh, etc), then this is very likely the situation. The login ID should be disabled, or the shell reset to '/bin/sync'.

Code [acc010a]

The listed login ID has a user ID of zero (0) and does not have a password. This could indicate an intrusion has occurred. This should be disabled immediately and the machine checked and cleaned.

Code [acc010aw]

The listed login ID has a user ID of zero (0) and does not have a password. This could indicate an intrusion has occurred. This should be disabled immediately and the machine checked and cleaned.

On this system, comments are not allowed in the password file. An attempt to comment out an entry simply results in a login ID which begins with a '#'. See message ID 'acc013w' for more information.

Code [acc011w]

The listed login ID does not have a password. Anyone can use this account, allowing them to explore the system for other security problems. Unless this is a secure captured account, this should be corrected.

Code [acc011wc]

On this system, comments are not allowed in the password file. An attempt to comment out an entry simply results in a login ID which begins with a '#'. See message ID 'acc013w' for more information.

Code [acc012w]

The listed login ID has a user ID of zero (0) and is not the 'root' account. This should be checked to see if it is legitimate. In any case, having login ID's with a user ID of zero tends to lead to security problems, and should be avoided (except for 'root')

Code [acc012wc]

On this system, comments are not allowed in the password file. An attempt to comment out an entry simply results in a login ID which begins with a '#'. See message ID 'acc013w' for more information.

Code [acc013w]

On this system, comments are not allowed in the password file. An attempt to comment out an entry simply results in a login ID which begins with a '#'. For example:

#joeuser:zqa4324x2423x:234:23:Joe User:/home/joeuser:/bin/csh

indicates a user with the username '#joeuser'. The account has not been disabled, it has simply been renamed. Such entries should be deleted from the system.