snort-users February 2008 archive
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snort-users: Re: [Snort-users] Bare byte alerts but no non-ASCII

Re: [Snort-users] Bare byte alerts but no non-ASCII characters!

From: Julio Cesar Gazquez <jgazque0_at_nospam>
Date: Fri Feb 22 2008 - 10:33:49 GMT
To: Todd Wease <twease@sourcefire.com>


El Jueves 21 Febrero 2008 16:46:08 escribió:
> That doesn't really help. There is no indication of any bare byte
> encoding here.

Exactly. It also seems to happen with other alerts, where the packet details I got don't match the intent of the alert. But bare byte encoding alerts seems to be the most evident case.

Yet I'm not sure if the alerts are wrong, or I'm getting packets that don't match the alerts.

> The basic check in Snort looks for a byte > 0x7F. It
> would be very helpful if you could post a pcap. Make sure it fires on
> the bare byte encoding by running it against Snort in read mode.

I just realized I don't have pcap logs, but unified logs, as I'm using Barnyard, so I can't read the logs back.

I guess I should run an extra snort instance in order to get logs useful for debugging... -- Julio César Gázquez Seguridad Informática -- Int. 736 Municipalidad de Rosario ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Snort-users mailing list Snort-users@lists.sourceforge.net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users