Re: snmp vulnerablities

[Jon DeShirley <jond () uidaho edu>]

I can only assume that the original poster was trying to exploit a bug
in HP's OpenView SNMP trap daemon.  This bug was posted to BugTraq
about a month ago.  (http://www.securityfocus.com/archive/1/189616 for
those interested)

However, I haven't been able to verify that this bug actually exists
since HP does not have any record of the patch mentioned in the
advisory.  The original advisory also mentions that the binary is suid
root, however, in my experience it drops it's privledges and runs as
bin.  bin isn't quite as nice as root, but it would work for spawning a
remote shell above 1024 with another inetd daemon (as the original
poster was trying).  

--jon


On 16 Jul, mht () clark net wrote:
> I have to agree with HC on this one, I can't remember echo being in the 
> list of SNMP Basic functions :
>
> 1. GET REQUEST
> 2. GET NEXT REQUEST
> 3. SET REQUEST
> 4. GET RESPONSE
> 5. TRAP MESSAGE
>
> Is the original poster referring to an older type of networked device (i.e. 
> OpenRoute, Proteon, Gator, WellFleet) that previously prompted the user 
> with > in order to set the SNMP options???
>
> *scratching head**
>
>
> At 03:01 PM 7/16/2001 -0700, Ron Russell wrote:
> > I cannot speak to the echo reference as well.  If he would like to expound
> > on it I would be most happy to listen.
> >
> > And the activity could have been prevented by proper use of ACLs, and the
> > proper configuration of SNMP (not using easily guessable strings).  I'm also
> > sure that there are similar vulnerabilities across server and switch
> > platforms, but I have not had the privilege of scanning one.
> >
> > Ron Russell - MCSE, CCNA, CNE
> > 480-6-Buddha
> > Silicon Buddha LLC
> > Enlightened Network Services
> > www.siliconbuddha.com
> > Offering Free Vulnerability Assessments from the deserts of Phoenix Arizona
> > ----- Original Message -----
> > From: "H C" <keydet89 () yahoo com>
> > To: "Ron Russell" <ron () siliconbuddha com>; <pen-test () securityfocus com>
> > Sent: Monday, July 16, 2001 1:56 PM
> > Subject: Re: snmp vulnerablities
> >
> >
> > Ron,
> >
> > Very interesting input regarding SNMP, though I'm not
> > really too clear on what it has to do with the
> > original author's use of 'echo' statements in an SNMP
> > utility.
> >
> > One question though...when you downloaded the router
> > config, could this activity have been prevented by
> > proper configuration of the router itself?  Since you
> > didn't specify the method used (SNMP?), I thought I'd
> > ask for clarification.
> >
> > Thanks,
> >
> > Carv
> >
> > --- Ron Russell <ron () siliconbuddha com> wrote:
> > > SNMP can also be used to write configuration
> > > parameters to Cisco Routers as
> > > well (assuming you have the read/write community
> > > string).  I have actually
> > > successfully downloaded a router config, unencrypted
> > > the hash for the
> > > passwords, and telnetted into the router.  I'm sure
> > > that there are multiple
> > > other security vulnerabilities here as well.
> > >
> > > Ron Russell - MCSE, CCNA, CNE
> > > 480-6-Buddha
> > > Silicon Buddha LLC
> > > Enlightened Network Services
> > > www.siliconbuddha.com
> > > Offering Free Vulnerability Assessments from the
> > > deserts of Phoenix Arizona
> > > ----- Original Message -----
> > > From: "H Carvey" <keydet89 () yahoo com>
> > > To: <pen-test () securityfocus com>
> > > Sent: Saturday, July 14, 2001 6:50 AM
> > > Subject: Re: snmp vulnerablities
> > >
> > >
> > > > Hi there. how do you exploit or gain access
> > > from vulnerable host using snmp
> > > vulnerablities. I've tried to used this command
> > > but its not work :
> > > >
> > >
> > > I'm not sure why you would try sending 'echo'
> > > commands to the SNMP agent...do any agents
> > > have a vulnerability that will allow them to
> > > write to the drive?
> > >
> > > I have always seen SNMP as a great recon
> > > protocol, especially when it is misconfigured
> > > (ie, default community strings, no restrictions
> > > on management stations, etc).  On Win2K, you
> > > can enum usernames, services, TCP/UDP info,
> > > etc.
> > >
> > > Systems running SNMP can divulge
> > > information...if they are misconfigured.  This
> > > is why many people call SNMP a 'dangerous'
> > > protocol.  As with anything else, some simple
> > > configuration steps can fix that.  Yes, if
> > > someone installs a sniffer and captures some
> > > datagrams containing your SNMPv1 read-write
> > > community string, you could most definitely
> > > have problems (though I doubt that those
> > > problems include the ability to write to the
> > > drive).  However, if someone is able to load a
> > > sniffer on your network, you've got other
> > > problems to worry about...


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