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SubjectRe: Linux needs flexible security
Hi!

> I know how to write a security monitor that does what you want:
> use ptrace. (Yeah, I know, ptrace is my one-trick pony.)

> The security monitor would be the parent process of the process that
> you wish to control. It would use PTRACE_SYSCALL to run the target's
> user-space instructions at full speed and filter the target's system
> call requests. For example, if your httpd tries to open "/etc/passwd"
> for reading, the security monitor simply logs the attempt, SIGKILL's
> the process, whatever.

Well, this already has been done for solaris, and is described/ready
for download at http://www.cs.berkeley.edu/~daw/janus/.
Pavel
--
I'm really pavel@ucw.cz. Look at http://195.113.31.123/~pavel. Pavel
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