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Date: Sun, 17 Dec 2000 01:20:07 -0800
From: Kris Kennaway <kris@FreeBSD.org>
To: Poul-Henning Kamp <phk@FreeBSD.org>
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org,
	security-officer@FreeBSD.org
Subject: Re: cvs commit: src/sys/netinet ip_icmp.c tcp_subr.c tcp_var.h
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In-Reply-To: <200012161942.eBGJg7j93654@freefall.freebsd.org>; from phk@FreeBSD.org on Sat, Dec 16, 2000 at 11:42:07AM -0800
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On Sat, Dec 16, 2000 at 11:42:07AM -0800, Poul-Henning Kamp wrote:
> phk         2000/12/16 11:42:07 PST
>=20
>   Modified files:
>     sys/netinet          ip_icmp.c tcp_subr.c tcp_var.h=20
>   Log:
>   We currently does not react to ICMP administratively prohibited
>   messages send by routers when they deny our traffic, this causes
>   a timeout when trying to connect to TCP ports/services on a remote
>   host, which is blocked by routers or firewalls.

This sounds like a security hole since ICMP messages don't have a TCP
sequence number meaning they can be trivially spoofed - am I wrong?

Kris

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