Re: [Plugins-writers] ssltest.nasl (Multiple ASN.1 parsing Issues)

From: John Lampe (jwlampe@private)
Date: Fri Dec 12 2003 - 11:26:54 PST

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    On Fri, 12 Dec 2003, Erik Parker wrote:
    
    >
    >
    > Morning,
    >
    > Typically I'd toss this to HD to debug here at the office, but he felt it was
    > OK to fly off to malaysia for a few weeks.. So I'll ask here. :)
    >
    > Using the stock tenable nasl script for CAN-2003-0543, CAN-2003-0544,
    > CAN-2003-0545..
    >
    > We're seeing it trigger on F5 BigIP's that F5 claim are fixed. They backport
    > all of their patches, and it's difficult to prove that these are actually
    > exploitable. I'm curious if anyone else has seen these possible false
    > positive.. or if F5 just hasn't patched properly.
    >
    > The plugin really doesn't look like it could possibly false+.. but I'd figure
    > I ask before I start getting into it with F5.
    >
    >
    >
    >
    > ---
    > Erik Parker
    > ---
    >
    Hey Erik, the plugin checks to see if the server will "complain" when sent
    a cert that was unrequested.  It is possible that F5 patched the
    "overflow" without fixing the erroneous behavior which enabled the
    overflow....The Plugin doesn't go so far as to try to overflow the
    machine, it only checks to see if the server accepts unrequested certs.
    
    John
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