[SOLVED] How can I force to crash a command with 's' permission in linux?

Issue

I want to read core dump of a s permission command and analyze it. So I need an approach to make crash these commands. For example, how can I make passwd or su crash and create a core dump? Using ^\ won't work for these commands.

Solution

Try sending the process a SIGSEGV signal as root:

~ # pidof passwd
12840
~ # kill -SIGSEGV 12840
~ #

Result:

~ # ls -l /sbin/passwd
-rwsr-sr-x    1 root     root        908672 Nov  8 18:28 /sbin/passwd
~ # ulimit -c 100000
~ # /sbin/passwd
Changing password for root
New password: Segmentation fault (core dumped)
/ #

Answered By - SKi