RE: EEYE: Microsoft ASN.1 Library Length Overflow Heap Corruption

From: Marc Maiffret (mmaiffret_at_eeye.com)
Date: 02/10/04

  • Next message: Conectiva Updates: "[CLA-2004:812] Conectiva Security Announcement - vim" 
    Date: Tue, 10 Feb 2004 11:44:43 -0800
To: "Joe Blatz" <sd_wireless@yahoo.com>, <BUGTRAQ@securityfocus.com>

    This attack can be performed through various encryption systems such as
    Kerberos and almost anything using CERTs... I am not sure about
    Microsofts wording in their advisory.

    Signed,
    Marc Maiffret
    Chief Hacking Officer
    eEye Digital Security
    T.949.349.9062
    F.949.349.9538
    http://eEye.com/Retina - Network Security Scanner
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    | -----Original Message-----
    | From: Joe Blatz [mailto:sd_wireless@yahoo.com]
    | Sent: Tuesday, February 10, 2004 11:36 AM
    | To: Marc Maiffret; BUGTRAQ@securityfocus.com
    | Subject: RE: EEYE: Microsoft ASN.1 Library Length Overflow
    | Heap Corruption
    |
    | In the security bulletin published by MS it states, "In the
    | most likely exploitable scenario, an attacker would have to
    | have direct access to the user's network."
    |
    | The bulletin published by eEye states "...applications that
    | make use of certificates (SSL, digitally-signed e-mail,
    | signed ActiveX controls, etc.) [are affected]".
    |
    | I see a big disconnect there. Can you address this?
    | Also, how would this potentially affect sites that are using
    | an MS VPN solution?
    |
    |
    | > -----Original Message-----
    | > From: Marc Maiffret [mailto:mmaiffret@eeye.com]
    | > Sent: Tuesday, February 10, 2004 10:20 AM
    | > To: BUGTRAQ@securityfocus.com
    | > Subject: EEYE: Microsoft ASN.1 Library Length Overflow Heap
    | Corruption
    | >
    | > Microsoft ASN.1 Library Length Overflow Heap Corruption
    | >
    | > Release Date:
    | > February 10, 2004
    | >
    | > Date Reported:
    | > July 25, 2003
    | >
    | > Severity:
    | > High (Remote Code Execution)
    | >
    | > Systems Affected:
    | > Microsoft Windows NT 4.0 (all versions) Microsoft Windows 2000 (SP3
    | > and earlier) Microsoft Windows XP (all versions)
    | >
    | > Software Affected:
    | > Microsoft Internet Explorer
    | > Microsoft Outlook
    | > Microsoft Outlook Express
    | > Third-party applications that use certificates
    | >
    | > Services Affected:
    | > Kerberos (UDP/88)
    | > Microsoft IIS using SSL
    | > NTLMv2 authentication (TCP/135, 139, 445)
    |
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