RE: 9660 : Microsoft IIS Unspecified Remote Denial Of Service Vu lnerability

kquest_at_toplayer.com
Date: 02/19/04

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    To: bugtraq@securityfocus.com
Date: Wed, 18 Feb 2004 18:17:44 -0500

    I want to mention that the claim about EEYE
    is my own logical conclusion. I don't know if
    it's true or not. I based my opinion on my own
    experience dealing with the OpenSSL and MS ASN.1
    vulnerabilities. I ended up writing my own
    X509 editor/decoder and SSL client when I was
    researching the OpenSSL vulnerabilities. When
    EEYE announced their MS ASN.1 discoveries
    I simply used what I already had... only on IIS
    (with some minor configuration changes).
    It seems logical to assume that they came
    across those MS vulnerabilities because of OpenSSL.
    For example, if you compare the first OpenSSL
    vulnerability to the MS ASN.1 Library Length
    Overflow Heap Corruption you'll see that
    they are too similar to be a simple coincidence...

    -----Original Message-----
    From: kquest@toplayer.com [mailto:kquest@toplayer.com]
    Sent: Wednesday, February 18, 2004 10:03 AM
    To: bugtraq@securityfocus.com
    Subject: bid: 9660 : Microsoft IIS Unspecified Remote Denial Of Service
    Vu lnerability

    This is not an unspecified remote DoS.
    This is related to the vulnerabilities discovered by EEYE.
    The reason the exploit caused a DoS is because the OpenSSL
    vulnerabilities and vulnerabilities discovered by EEYE overlap.
    They both have a length integer overflow. I actually believe that
    EEYE discovered their vulnerabilities right after the OpenSSL
    vulnerabilities came out. They ran their PoC code against
    IIS and discovered a DoS (just like this bid reports). Then they
    dug a bit deeper and now we have those multiple MS ASN.1 vulnerabilities
    that everybody is talking about. It was pretty much a no brainer for them.

    Kyle

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