Microsoft Exchange OWA deeply-nested folder request denial of service
| exchange-owa-folder-request-dos (7168) |  Medium Risk |
Description:
Microsoft Exchange Server 2000 using the Outlook Web Access (OWA) service is vulnerable to a denial of service attack. If an attacker makes repeated requests for non-existent and deeply-nested mail folders, the attacker could cause the consumption of all CPU availability on the server processing the request. The server would resume normal functionality once the request has completed.
Platforms Affected:
- Microsoft, Exchange Server 2000
Remedy:
Apply the patch for this vulnerability, as listed in Microsoft Security Bulletin MS01-049. See References.
Consequences:
Denial of Service
References:
- Microsoft Security Bulletin MS01-049, Deeply-nested OWA Request Can Consume Server CPU Availability at http://www.microsoft.com/technet/security/bulletin/ms01-049.mspx.
- BID-3368: Microsoft Exchange OWA Server Resource Starvation Vulnerability
- CVE-2001-0666: Outlook Web Access (OWA) in Microsoft Exchange 2000 allows an authenticated user to cause a denial of service (CPU consumption) via a malformed OWA request for a deeply nested folder within the user's mailbox.
Reported:
Sep 26, 2001
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