Re[2]: mirc32 6.0x crash when resolving dns.

From: 3APA3A (3APA3A_at_SECURITY.NNOV.RU)
Date: 05/29/03

  • Next message: sin: "Gera's Insecure Programing abo7" 
    Date: Thu, 29 May 2003 11:52:59 +0400
To: Peter Pentchev <roam@ringlet.net>

    Dear Peter Pentchev,

    A way to delegate reverse resolution for network less than /24 is
    defined in RFC 2317. And it's different from one used.

    But you're right: the problem is probably not in unresolvable PTR. The
    problem is in unresolvable CNAME instead of PTR, so PTR is never found
    at all. And yes: it may affect different applications where
    gethostbyname() is used. I will test gethostbyname() behavior for this
    case in Windows and Unix and report back.

    --Thursday, May 29, 2003, 11:26:04 AM, you wrote to 3APA3A@SECURITY.NNOV.RU:

    PP> On Wed, May 28, 2003 at 02:45:25PM +0400, 3APA3A wrote:
    >> Dear Davide Del Vecchio,
    >>
    >> Currently 210.193.16.25 doesn't resolve. But during original test it had
    >> flowed PTR record:
    >>
    >> bash-2.03$ host 210.193.16.25
    >> 25.16.193.210.IN-ADDR.ARPA is a nickname for 25.16.16.193.210.IN-ADDR.ARPA
    >>
    >> (.16 is twice)

    PP> This is not necessarily a flawed record; I believe it might be as simple
    PP> as the ultimate in classless reverse DNS delegation. Note that the
    PP> 16.193.210.in-addr.arpa zone is delegated to ns[12].qala.com.sg, while
    PP> this specific "alias" subdelegates the reverse DNS records for
    PP> 210.193.16.25 to dns[12].lga.net.sg.

    PP> G'luck,
    PP> Peter 

    -- 
~/ZARAZA
Ибо факты есть факты, и изложены они лишь для того, чтобы их поняли и в них поверили. (Твен)
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