Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!kramden.acf.nyu.edu!brnstnd
From: brnstnd@kramden.acf.nyu.edu (Dan Bernstein)
Newsgroups: comp.unix.questions
Subject: Re: How to prevent VI from getting a shell?
Message-ID: <13775:Sep2104:58:1490@kramden.acf.nyu.edu>
Date: 21 Sep 90 04:58:14 GMT
References: <501@trux.UUCP> <570@DIALix.UUCP> <1990Sep18.163019.14294@eci386.uucp>
Organization: IR
Lines: 8

In article <1990Sep18.163019.14294@eci386.uucp> jmm@eci386.UUCP (John Macdonald) writes:
> The only
> way to prevent shell access is to patch vi to prevent it.

This just isn't true. All you have to do is break the user's !, Q, and :
keys. This turns from a joke into an easy pipe if you have pty.

---Dan