[CentOS] CentOS-5.2 su -l is failing

[James B. Byrne]

I noticed that the suid mode was missing and set it with chmod u+s
/usr/bin/su.  Now the permissions are:

$ ll $(which su)
-rwsr-xr-x 1 root root 24120 May 24  2008 /bin/su

And now su -l works for ordinary users.  Thank you very much.

I am certain that I have not been changing file modes in /usr/bin, ever. 
Does anyone have any idea how this change could occur?  Where would a file
mode change be logged, if at all?

Thanks.


-- 
***          E-Mail is NOT a SECURE channel          ***
James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
9 Brockley Drive              vox: +1 905 561 1241
Hamilton, Ontario             fax: +1 905 561 0757
Canada  L8E 3C3