Re: [Full-Disclosure] NTmail (GMS) 8 filtering bug

From: Geo (geoincidents@GETINFO.ORG)
Date: 11/19/02

  • Next message: Russ: "Alert: Microsoft Security Bulletin - MS02-065"
    Date:         Tue, 19 Nov 2002 14:04:14 -0500
    From: Geo <geoincidents@GETINFO.ORG>

    Gordano has released a patch for the GMS version 8 filter issue.

    The patch can be downloaded from

    The KB article about it is at

    I have not been able to confirm if this patch is available for all version 8
    users or only for ones with a current upgrade key but it appears to be a
    hotfix so it looks like it should work for everyone.


    -----Original Message-----
    The following exploit was discovered simultaneously by a number of NTmail
    users, I'm just one of them. In NTmail version 8 there is a mail filtering
    addon called JUCE which allows filtering of email by using a reserved
    words/phrases type filter.

    Many NTmail admins use this feature to filter email virus and trojans due to
    the excessive cost of the NTmail anti-virus addon. In some cases we filter
    based on code techniques that are common to email virus in order to possibly
    stop future virus and virus mutations that have not yet surfaced. Some even
    use this feature in addition to the standard anti-virus dll because of this
    capability. It's also one of the best spam filters available for NTmail.

    In version 8 this filter is broken. It works as advertised to stop an email
    addressed to a single recipient however if the email is addressed to
    multiple recipients then only the first one is blocked and the email is
    delivered to all the remaining addresses.

    Delivery co-sponsored by TruSecure Corporation
    Demonstrate your knowledge and understanding of core IT Security, become
    TICSA certified.

    Are you responsible for IT security in job function, but not necessarily
    in title? Do you want to prove your IT security knowledge and increase
    opportunities? Interested? Visit;

    for more information.