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Re: Veritas BackupExec (remote DoS)
From: Matthew Keller <kellermg () POTSDAM EDU>
Date: Wed, 17 Jan 2001 13:32:08 -0500

        Also confirmed with the BackupExec Mac and UNIX (Solaris at least)
agents. Corroborated Win9x and Linux.

Hi,

I can verify that this problem exists also on the Win9x agents, I couldnt figure out why the agents on our network 
kept crashing every sunday, and eventually I
figured out that this was about the time that I had weekly portscans scheduled.

I spoke with Veritas tech support - but nothing was ever done about it.

Jason Griffiths


     ----- Original Message -----
     From: Jonah Kowall
     To: BUGTRAQ () SECURITYFOCUS COM
     Sent: Monday, January 15, 2001 12:57 PM
     Subject: Re: Veritas BackupExec (remote DoS)

     Doesn't the agent only work on backup exec enterprise editions?  That's what I'm using it with.  If you tell 
them you are using the enterprise edition, maybe you
     can get a different response?  Tell them you are evaluating it if need be.

     I have connected to it, and disconnected, and I didn't see it stop responding.  I have also opened 3 separate 
connections, and found it took all three
     simultaneously.

     Backup Exec -- Unix Agent, Version 5.01 Revision 5.023
     Copyright 1999 VERITAS Software Corporation.  All Rights Reserved.

     This is the version of the Linux agent I am running on redhat 6.2.


     -----Original Message-----
     From: oh3mqu+bugtraq () TERAFLOPS COM [mailto:oh3mqu+bugtraq () TERAFLOPS COM]
     Sent: Monday, January 15, 2001 8:25 AM
     To: BUGTRAQ () SECURITYFOCUS COM
     Subject: Veritas BackupExec (remote DoS)


     Hello,

     I am using Backup system from Veritas Software (http://www.veritas.com/)
     and its Linux agent.  That agent is listening TCP-socket (8192 in my
     system) and if someone makes connection to that socket, but do not send
     anything to it, the agent hangs forever, even if you close that
     connection.  For example portscanners make it to hang.

     I think that the problem is that the software is not using select()
     function calls before read() calls and it is not using threads either.

     I reported that to the Veritas and they replied "Unfortunately our Backup
     Exec Desktop Products do not support backing up Linux machines.  I'm
     afraid we would be unable to assist you in this instance, however
     thank you for your interest."

     --
     Ari Saastamoinen
     oh3mqu+bugtraq () teraflops com

--

 Matthew Keller
 WebMaster, Interim Network Manager &
   Host Systems Analyst
 Computing & Technology Services
 Information Services Division
 State University of New York at Potsdam

 Website: http://mattwork.potsdam.edu/
 PGP: http://mattwork.potsdam.edu/crypto/


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