Date: Sat, 21 Jul 2001 14:37:36 +0100 From: Brian Somers <brian@Awfulhak.org> To: "Richard A. Steenbergen" <ras@e-gerbil.net> Cc: Peter Pentchev <roam@orbitel.bg>, freebsd-security@FreeBSD.org, freebsd-gnats-submit@FreeBSD.org Subject: bin/22595: telnetd tricked into using arbitrary peer ip (was: telnetd suckage) Message-ID: <200107211337.f6LDbag72093@hak.lan.Awfulhak.org> In-Reply-To: Message from Peter Pentchev <roam@orbitel.bg> of "Sat, 21 Jul 2001 16:11:08 %2B0300." <20010721161108.A19430@ringworld.oblivion.bg>
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> On Fri, Jul 20, 2001 at 03:58:09PM -0400, Richard A. Steenbergen wrote: > > Speaking of telnetd sucking, did anyone ever get around to fixing > > http://www.freebsd.org/cgi/query-pr.cgi?pr=22595 > > > > Doesn't look like it. > > Do you have any actual suggestions on how to 'make realhostname*() > not suck', as you have so helpfully suggested as a fix? I don't understand this PR. What's the problem ? realhostname*() takes the connecting IP, turns it into a name and resolves that name. If the *original* IP isn't in the list (or if a name couldn't be found from the IP), it puts the *original* ip in utmp/wtmp. If the *original* IP is in the list, it uses the name that the IP was turned into. The difference between ``w'' and ``w -n'' is whether ``w'' will look up IP numbers found in utmp. The fact that you're seeing different answers means that realhostname_sa() stored the IP number in utmp. The example in the PR means that someone connected from 199.95.76.12. There's nothing wrong with realhostname_sa() here. Can the originator please follow up with a better description of what the perceived problem is please ? > G'luck, > Peter > > -- > This sentence is false. -- Brian <brian@freebsd-services.com> <brian@Awfulhak.org> http://www.freebsd-services.com/ <brian@[uk.]FreeBSD.org> Don't _EVER_ lose your sense of humour ! <brian@[uk.]OpenBSD.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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