Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com Date: Mon, 12 Feb 2001 11:42:22 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: effective user id Message-ID: <20010212114222.J2107@cygbert.vinschen.de> Mail-Followup-To: cygwin@cygwin.com References: <20010212104724.H2107@cygbert.vinschen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20010212104724.H2107@cygbert.vinschen.de>; from cygwin@cygwin.com on Mon, Feb 12, 2001 at 10:47:24AM +0100 On Mon, Feb 12, 2001 at 10:47:24AM +0100, Corinna Vinschen wrote: > On Sat, Feb 10, 2001 at 02:04:17PM +0800, Guy Worthington wrote: > > If I'm logged in as an administrators member and then in a console type: > > > > su guest > > > > I get the error > > > > su: Cannot set group id: Invalid argument > > > > I'm trying to switch to another effective user ID with no password in > > the same way as has been exploited for anonymous ftp > > (as described in the article: inetutils-1.3.2.README). > > > > How do I switch my effective user ID to another user without a password. > > http://cygwin.com/docs.html Sorry, that's a bit short. Correct answer: You can switch the euid without a password if and only if the user you switch to has no password. More info: http://cygwin.com/cygwin-ug-net/ntsec.html#NTSEC-SETUID Other prerequisites are correct passwd and group files. Your above error is probably related to a incorrect /etc/group file. The gid in the users passwd entry is not mentioned in /etc/group or sth similar. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Developer mailto:cygwin@cygwin.com Red Hat, Inc. -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple