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Date:      Sun, 24 Mar 2002 00:34:57 -0800
From:      Kris Kennaway <kris@obsecurity.org>
To:        dill@canada.com
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Security of downloaded binary (packages)
Message-ID:  <20020324003457.A44609@xor.obsecurity.org>
In-Reply-To: <20020324072243.3398.cpmta@c009.snv.cp.net>; from dill@canada.com on Sat, Mar 23, 2002 at 11:22:43PM -0800
References:  <20020324072243.3398.cpmta@c009.snv.cp.net>

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On Sat, Mar 23, 2002 at 11:22:43PM -0800, dill@canada.com wrote:

> If someone poisoned my DNS and put a fake entry instead of
> ftp.freebsd.org then I could download torjan instead of what I want.

Correct.  You'll have to decide for yourself whether the risk is worth
the benefit.  Cryptographically signing packages is something we've
thought about, and will probably start doing at some point in the
future.  It will take a bit of work to set up the infrastructure
though.

> Are there MD5 signature of package files that I can verify ??

If you can't trust your DNS, how can you trust an MD5 signature you
download from an untrusted source?  MD5 isn't actually a signature,
it's a checksum.

Kris


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