Date: Mon, 28 Jul 1997 14:44:30 -0400 (EDT) From: Robert Watson <robert@cyrus.watson.org> To: Vincent Poy <vince@mail.MCESTATE.COM> Cc: Guido van Rooij <guido@gvr.win.tue.nl>, loco@onyks.wszib.poznan.pl, security@FreeBSD.ORG, mario1@PrimeNet.Com, johnnyu@accessus.net Subject: Re: security hole in FreeBSD Message-ID: <Pine.BSF.3.95q.970728143423.3342G-100000@cyrus.watson.org> In-Reply-To: <Pine.BSF.3.95.970728113012.3844P-100000@mail.MCESTATE.COM>
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On Mon, 28 Jul 1997, Vincent Poy wrote: > On Mon, 28 Jul 1997, Robert Watson wrote: > > What does the -s do anyways? I know it means secure but isn't it > supposed to be secure already out of the box? -s prevents syslogd from accepting network network log messages. Without it, anyone who can deliver a packet to the syslog port using UDP can add a line to your system logs. When you add entries to syslog.conf like this: *.error @loghost.domain you rely on not having the -s flag set. Allowing log messages from unauthorized hosts is a security problem, as someone can insert ficticious messages (often-times, spoofed), flood your logs, etc. Robert N Watson Junior, Logic+Computation, Carnegie Mellon University http://www.cmu.edu/ Network Security Research, Trusted Information Systems http://www.tis.com/ Network Administrator, SafePort Network Services http://www.safeport.com/ robert@fledge.watson.org rwatson@tis.com http://www.watson.org/~robert/
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