Re: ISS Security Advisory: Hidden community string in SNMP

From: sugarat (sugaratat_private)
Date: Mon Nov 16 1998 - 13:49:58 PST

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    >
    >
    > I am seeing the same results on a 2.6 and a 2.5.1 system with B.5.01 NNM
    > installed.
    >
    > matt
    
    Do you only see the output when you are on the local machine?
    How about from spoofed 127.0.0.1 packets?  Is sending a reset from 127.0.0.1
    enough to make hte host think it is the local machine?
    If so, then a local firewall, not permitting 127 packets from outside the
    machine is necessary, and even then you better trust the people who have
    access to the box itself.
    
    We have tried a box, Solaris 2.6 patched to current (current as of september),
    that is running the default Sun snmpd binary.  The hidden community
    "all private" worked from local and remote machines.
    
    I'm not quite sure what we're going to do about this, but on non critical
    boxes, ie: the ones we watch only for cold start traps, we have turned of
    snmpd and use shell scripts that call snmptrap to send the traps we need to
    receive.
    
    If anybody else has any solutions, I'm sure we'd all love to hear them.
    
    -Tim
    --
    Timothy Kennedy                 |       Erol's Internet Service
    Network Administrator           |       1-703-321-8000 ext. 2224
    sugaratat_private               |       http://www.erols.com
    



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