could sudo read hash passwords? how?


 
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Old 04-21-2008
Data could sudo read hash passwords? how?

Hello,

user ABC is granted sudo rights to start the application.
So upon attempting to start the application, user ABC is required to enter its password.

If we wanted to user ABC is create a cron job to start the application, how will user ABC feed in the password in the cron job?

I know sudoers file allows NOPASSWD parameter, to not get prompted for password. But, that is not allowed to us.

Is it possible to create a file with hashed password for ABC and pass it to the sudo command? If possible, then how?

Are there any other alternatives?

Thank you.
 
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PAM_TIMESTAMP_CHECK(8)						 Linux-PAM Manual					    PAM_TIMESTAMP_CHECK(8)

NAME
pam_timestamp_check - Check to see if the default timestamp is valid SYNOPSIS
pam_timestamp_check [-k] [-d] [target_user] DESCRIPTION
With no arguments pam_timestamp_check will check to see if the default timestamp is valid, or optionally remove it. OPTIONS
-k Instead of checking the validity of a timestamp, remove it. This is analogous to sudo's -k option. -d Instead of returning validity using an exit status, loop indefinitely, polling regularly and printing the status on standard output. target_user By default pam_timestamp_check checks or removes timestamps generated by pam_timestamp when the user authenticates as herself. When the user authenticates as a different user, the name of the timestamp file changes to accommodate this. target_user allows to specify this user name. RETURN VALUES
0 The timestamp is valid. 2 The binary is not setuid root. 3 Invalid invocation. 4 User is unknown. 5 Permissions error. 6 Invalid controlling tty. 7 Timestamp is not valid. NOTES
Users can get confused when they are not always asked for passwords when running a given program. Some users reflexively begin typing information before noticing that it is not being asked for. EXAMPLES
auth sufficient pam_timestamp.so verbose auth required pam_unix.so session required pam_unix.so session optional pam_timestamp.so FILES
/var/run/sudo/... timestamp files and directories SEE ALSO
pam_timestamp_check(8), pam.conf(5), pam.d(5), pam(8) AUTHOR
pam_tally was written by Nalin Dahyabhai. Linux-PAM Manual 09/19/2013 PAM_TIMESTAMP_CHECK(8)