[16872] in bugtraq

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Re: Resend: Sendmail filter to prevent SMTP exploitation of the

daemon@ATHENA.MIT.EDU (John D. Hardin)
Fri Sep 22 11:07:02 2000

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Content-Type: TEXT/PLAIN; charset=US-ASCII
Message-Id:  <Pine.LNX.4.10.10009211958030.27-100000@gypsy.rubyriver.com>
Date:         Thu, 21 Sep 2000 19:59:08 -0700
Reply-To: "John D. Hardin" <jhardin@WOLFENET.COM>
From: "John D. Hardin" <jhardin@WOLFENET.COM>
X-To:         Bennett Samowich <brs@BEN-TECH.COM>
To: BUGTRAQ@SECURITYFOCUS.COM
In-Reply-To:  <4.2.0.58.20000920165502.00adc5d0@localhost>

On Wed, 20 Sep 2000, Bennett Samowich wrote:

> Perhaps it is time to revisit the content filters on our mail
> servers before the inevitable exploit is released and until proper
> resolution can be made.  By using sendmail's libmilter, it is
> possible to reject messages with .dll attachments (see below).  I
> am sure that there are other methods as well (e.g. procmail,
> etc.).

Let me chime in here:

  http://www.impsec.org/email-tools/procmail-security.html

--
 John Hardin KA7OHZ   ICQ#15735746   http://www.wolfenet.com/~jhardin/
 jhardin@wolfenet.com      pgpk -a finger://gonzo.wolfenet.com/jhardin
  768: 0x41EA94F5 - A3 0C 5B C2 EF 0D 2C E5  E9 BF C8 33 A7 A9 CE 76
 1024: 0xB8732E79 - 2D8C 34F4 6411 F507 136C  AF76 D822 E6E6 B873 2E79
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  "Bother," said Pooh as he struggled with /etc/sendmail.cf, "it never
  does quite what I want. I wish Christopher Robin was here."
				-- Peter da Silva in a.s.r
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   38 days until Daylight Savings Time ends

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