Microsoft Exchange Server OWA could allow unauthorized email account access

exchange-owa-account-access (13869) The risk level is classified as MediumMedium Risk


Microsoft Exchange Server, when using the Outlook Web Access (OWA), could allow a remote authenticated attacker to gain unauthorized access to a victim's email account. If Microsoft Windows SharePoint Services is installed on a system running Microsoft Windows Server and Microsoft Exchange Server, the Kerberos authentication in Internet Information Services (IIS) is disabled, which would result in improper handling of OWA requests to the vulnerable Exchange Server.


Gain Access


Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS04-002. See References.

As a workaround re-enable and properly configure Kerberos authentication in IIS. See Microsoft Windows Server Support Article dated November 25, 2003 for details.


Platforms Affected:

  • Microsoft Exchange Server 2003


Nov 14, 2003

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