Re: recycled rant from another list

Date: Fri Apr 20 2001 - 15:54:41 PDT

"Stephen D. Williams" <> writes:
> "Adam L. Beberg" wrote:
> > On Wed, 11 Apr 2001, Joseph S Barrera III wrote:
> > > IF it's impossible to write C code without buffer overruns
> It's not impossible, just a pain and you have to avoid certain functions
> in certain contexts.

Juggling eleven beanbags isn't impossible either; you just have to put
your hands in the right places at the right times and toss the
beanbags with roughly the right velocity. In fact, there was once a
juggler who could actually do this.

> There is a version of gcc that catches buffer overruns as soon as they
> happen, for more secure daemons.

There are several. StackGuard is the most practical; it catches the
particular kind of buffer overrun that is easiest to exploit --- the
stack buffer overrun that overwrites the return address. Electric
Fence catches another set at a substantial performance and memory
cost. Greg McGary's bounds-checking version of gcc should
theoretically catch all buffer overflows, but its output is still too
slow for production use.

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