From owner-freebsd-security Mon Feb 11 18:20:20 2002 Delivered-To: freebsd-security@freebsd.org Received: from newman2.bestweb.net (newman2.bestweb.net [209.94.102.67]) by hub.freebsd.org (Postfix) with ESMTP id E2E7737B435 for ; Mon, 11 Feb 2002 18:16:38 -0800 (PST) Received: from okeeffe.bestweb.net (okeefe.bestweb.net [209.94.100.110]) by newman2.bestweb.net (Postfix) with ESMTP id 38E61232EA; Mon, 11 Feb 2002 21:16:36 -0500 (EST) Received: by okeeffe.bestweb.net (Postfix, from userid 0) id 8FF5C9F279; Mon, 11 Feb 2002 21:11:43 -0500 (EST) To: Paulo Fragoso Cc: freebsd-security@FreeBSD.ORG Subject: Re: Auditing Date: Tue, 05 Feb 2002 16:48:40 -0800 From: Eli Dart Message-Id: <20020212021143.8FF5C9F279@okeeffe.bestweb.net> Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org --==_Exmh_-932282952P Content-Type: text/plain; charset=us-ascii I don't know all the details involving your particular incident, but at one time there was a bug in PC-Anywhere that caused it to listen on UDP port 22 (they didn't put their port number in network byte order as I remember). I still see scanners looking for UDP port 22 every once in a while (script kiddies looking for poorly configured PC-Anywhere instances). So, this could be unrelated to your incident, and just be some random script kiddie. In general, if you turn on log_in_vain on a box that is directly connected to the Internet, you'll see a lot of random cruft.... --eli In reply to Paulo Fragoso : > Hi, > > We have a client which was using 4.2-RELEASE and telnetd enabled. In that > machine was running an ircd installed and started by a hacker, probaly > exploiting telnetd hole. > > We have instaled 4.5-RELEASE using another HD and log_vain="YES" in the > rc.conf. Some time after that upgrade, someone try to connect in this > machine: > > Connection attempt to UDP mmm.mmm.mmm.mmm:22 from hhh.hhh.hhh.hhh:1384 > > How can we found in the old system all mechanism to enable remotely ircd > or backdoor? Are there any rootkit which it has a backdoor at UDP port 22? > > Paulo. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message --==_Exmh_-932282952P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: This is a comment. iD8DBQE8YH1oLTFEeF+CsrMRAhd4AJ9qe+Ih9T8B/h0XLRjX/bTpNDXarwCghMxd KTYAQh0z9P4/vxVRYenWbjk= =rPAA -----END PGP SIGNATURE----- --==_Exmh_-932282952P-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message