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Re: [PLUG] shell script help...
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- From: "Mag Gam" <magawake@gmail.com>
- To: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org>
- Subject: Re: [PLUG] shell script help...
- Date: Sat, 1 Sep 2007 09:52:32 -0400
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Would wrapping "script" do better user auditing? or are there any downsides for that?
On 9/1/07, Mag Gam <
magawake@gmail.com> wrote:Wow..didn't think about this.
B. Subshell, invoked with invalid or non-existant history file $ HISTFILE="" bash {nefarious commands...} $ exit $ logout
On Saturday 01 September 2007, Mag Gam wrote: > I am in the process of writing a shell script to take history file (fc -l) > and backup it up, while appending it. > > My strategy is, once the user exits out of his shell, i will dump the
> history into a file by using a trap() with EXIT. The file will be appended > by the username... (ie, username.history.date
I would not attempt to rely on this for any measure of security, as it can be
easily circumvented by users. For example, one could:
A: Subshell, then remove the history file $ bash {nefarious commands...} $ exit $ rm ~/.bash_history
$ logout
B. Subshell, invoked with invalid or non-existant history file $ HISTFILE="" bash {nefarious commands...} $ exit $ logout
All of this could just as easily be hidden in a script, making it very
difficult to catch. It would be a better idea to use IDS/auditing software than to rely on something controlled by the user.
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