Bugtraq mailing list archives

Re: Problem with default slackware crontabs


From: andi () vipe technion ac il (Andi Gutmans)
Date: Wed, 25 Dec 1996 13:24:19 +0200


Hey,

On my redhat system this isn't the case.
The temp file of db is in /var/lib which is only writeable by root.

Andi

At 14:34 24/12/96 -0900, Jon Snyder wrote:
Using Slackware 3.0, I noticed a problem with the default root crontab.  It
runs updatedb at 7:40 a.m. every day, but unforunately updatedb has a
temporary file security problem--it doesn't check for symlinks (or if the
file exists, for that matter).  updatedb will write to /var/tmp (or
/usr/tmp), and although the filename includes the PID of the shell the
script is running under, a vulnerability still exists.  I've taken updatedb
out of my crontab, because locate is never used on my system.  However, it
might be wise to modify the script so as to prevent exploits from
compromising your systems.


Jon Snyder
Student Network Technician, FNSBSD
(907) 452-2000 x. 376





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