Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Delivered-To: mailing list cygwin@cygwin.com To: cygwin@cygwin.com X-Injected-Via-Gmane: yes Path: not-for-mail From: Andrew DeFaria Newsgroups: gmane.os.cygwin Subject: Re: login: no shell: /bin/bash: Permission denied Date: Thu, 07 Mar 2002 07:44:22 -0800 Lines: 43 Message-ID: <3C878AD6.3020307@DeFaria.com> References: <20020306101433.P13590@cygbert.vinschen.de> <3C866A0B.6040500@DeFaria.com> <20020306213202.C13590@cygbert.vinschen.de> <3C869077.3090705@DeFaria.com> <20020307102348.N13590@cygbert.vinschen.de> NNTP-Posting-Host: dsl-64-195-250-225.telocity.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Trace: quimby2.netfonds.no 1015516264 17398 64.195.250.225 (7 Mar 2002 15:51:04 GMT) X-Complaints-To: usenet@quimby2.netfonds.no NNTP-Posting-Date: 7 Mar 2002 15:51:04 GMT User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:0.9.4) Gecko/20011128 Netscape6/6.2.1 X-Accept-Language: en,ru Corinna Vinschen wrote: > On Wed, Mar 06, 2002 at 01:56:07PM -0800, Andrew DeFaria wrote: > >>OK then, seems to me that su might be implementable by using a service >>that runs as SYSTEM and takes requests to switch user from user A to >>user B. Possible? >> > > Sure. It's exactly the way the user switch is implemented in 2K/XP. So then su can be implemented in Cygwin. > >>Regardless, to me it's still would be a large security hole if all one >>needs to do is: >> >>$ echo "+" > ~/.rhosts >> >>to be able to abuse rsh to do something under somebody else's user ID is >>it not? >> > > It's the same on U*X. If you don't care for the permissions of > your home directory you're out of luck. No it's not! As I've said repeatedly already a ~/.rhosts need not exist. Also, it does not seem to matter if my home directory is locked down or not. If user A wishs to login as user B and user A can create files in his own home directory (and even if he can't since the presence of ~usera/.rhosts is not required) all user A needs to do is use rsh with a -l userb parameter to execute commands as user B. This is not the same as on Unix. > And rsh is a dangerous service anyway. If you don't want it, > just remove the matching line in /etc/inetd.conf and use ssh. Ah but I *want* rsh. I just want it to work correctly. :-) -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/