Date: Mon, 19 Apr 2021 11:35:32 -0600 (MDT) From: Ariadne Conill <ariadne@...eferenced.org> To: oss-security@...ts.openwall.com cc: security@...ian.org Subject: Re: xscreensaver package caps gets raw socket Hello, On Mon, 19 Apr 2021, David A. Wheeler wrote: >> On Sat, 17 Apr 2021 at 07:41:15 -0700, Tavis Ormandy wrote: >>> Oh, I also pitched using popen("/bin/ping" ..), but I think nobody is >>> really convinced that will work, but I kinda like it :) > > On Apr 18, 2021, at 8:25 AM, Simon McVittie <smcv@...ian.org> wrote: > >> That's consistent with the principle of least-privilege, and the widely >> cited Unix philosophy of having programs that do one thing well. >> >> If you need to gain privileges, then I think that's a much, much better >> approach - ideally a new ping-like program that prints a machine-readable >> syntax rather than having to screen-scrape human-readable output, but >> if that's not available then ping itself is the next best thing. > > > I agree, running “ping” in a separate process > is FAR better than giving the “main” process > extra permissions it doesn’t actually need. > You’d have to be careful about the parameters sent, but that’s necessary anyway. > I don’t see the problem of calling /bin/ping, that sounds like the right answer. > > Scraping is undesirable, but sometimes needed. If this is a common need, a > long-term solution might be to create an option on ping to generate a standard > format that’s easier to machine-parse. This already exists as fping(1), for example: $ fping -C4 -q google.com google.com : 46.8 41.4 45.8 43.7 Ariadne
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