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Re: PCP exploit: pmpost - another nice symlink follower

To: Jan-Frode Myklebust <janfrode@xxxxxxxxxxxxxxx>
Subject: Re: PCP exploit: pmpost - another nice symlink follower
From: Mark Goodwin <markgw@xxxxxxx>
Date: Tue, 19 Jun 2001 17:30:18 +1000 (EST)
Cc: pcp@xxxxxxxxxxx
In-reply-to: <20010619090111.A19149@ii.uib.no>
Sender: owner-pcp@xxxxxxxxxxx
On Tue, 19 Jun 2001, Jan-Frode Myklebust wrote:

> On Tue, Jun 19, 2001 at 08:17:03AM +0200, Michal Kara wrote:
> >   I guess this is of a high importance for people on this list... If you 
> > don't
> > need pmpost suided, just remove the suid bit and it'll be fine.
> > 
> 
> I just verified this on IRIX (not the opensource
> pcp), which also is vulnerable. Could somebody at 
> sgi tell us the consequence of removing the suid 
> bit here?
> 

As Michal said, the fix is to remove the suid bit.

The only consequence is that the PCP "NOTICES" file
(/var/log/pcp/NOTICES on linux, and /var/adm/pcplog/NOTICES 
on IRIX) will not be created if it doesn't exist. This
should only affect a new installation, so you would have
to create this file by hand.

We'll have a new PCP RPM as soon as we can. For IRIX, a patch
may be necessary.

-- Mark Goodwin
SGI Engineering



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