Bug #406

Password change fails for many characters

Added by alien almost 15 years ago. Updated over 12 years ago.

Status:Closed Start date:
Priority:Normal Due date:12/31/1969
Assignee:jams % Done:

0%

Category:- Spent time: -
Target version:6.00.04

Description

Passwords with @, $, *, ( or ) do not work when set from the menus.

This happens for userIDs on setup and on the web interface password. I almost was locked out of root when I first did this but then discovered I can sudo password from another userID. I except not everyone will think of this recovery.

I almost made this critical because it appears that the passwords are being executed by the shell in certain circumstances. See the last example below where I caused a "ls -l /home" to be executed. The following:
"x;sudo rm -rf /would be really really bad.

Examples (from running mythinstall -s webuser from the command line):

Password: x$$x
Result: adding webUSERNAME mythtv with pass x20767x

Password: x
Result: adding webUSERNAME mythtv with pass appletrailer.xml

Password: x(x)
Result: sh: -c: line 0: syntax error near unexpected token `('
sh: -c: line 0: `sudo myth_user_call -c web -umythtv -p x*x('

Password: x;ls -al /home
Result:
Running program to make the changes for web password adding webUSERNAME mythtv with pass x total 16 drwxr-xr-x 4 root root 4096 2009-06-20 11:48 . drwxr-xr-x 22 root root 4096 2009-06-20 17:08 .. drwx------ 5 allen allen 4096 2009-06-21 09:04 allen drwxr-xr-x 6 mythtv mythtv 4096 2009-06-21 09:13 mythtv i should save my settings(2) Europe/Berlin c save t syssettings template is syssettings d localhost 0 [mythtv@violet home]$

History

Updated by alien almost 15 years ago

Just to add to this. Adding various quotes to the script probably won't help. There is always risk that the user will accidentally close the quotes in their password. I'm not sure it is possible to write a safe password changing program that uses a script or makes any shell calls to commands like htpasswd.

I just checked and lighttpd doesn't do PAM authentication, so we can't use that to get around the problem.

Updated by jams almost 15 years ago

Special character check is now enforced or escaped out.
A person would now need to try a bit harder to erase thier harddrive with the web security module.
Although anybody using ;rm -rf / as a password needs to have their head examined.

Updated by jams over 12 years ago

  • Target version changed from 8.0 to 6.00.04

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