Microsoft Exchange IMAP command denial of service

exchange-imap-command-dos (33890) The risk level is classified as MediumMedium Risk

Description:

Microsoft Exchange is vulnerable to a denial of service attack, caused by an invalid memory request in the IMAP service. A remote attacker could send a specially-crafted IMAP command to an Exchange Server configured as an IMAP server to cause the email service to stop responding.

*CVSS:

Base Score: 5
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

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

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.

References:

  • iDefense Labs PUBLIC ADVISORY: 05.08.07: Microsoft Exchange Server 2000 IMAP Literal Processing DoS Vulnerability.
  • Microsoft Security Bulletin MS07-026: Vulnerabilities in Microsoft Exchange Could Allow Remote Code Execution (931832).
  • Microsoft Security Bulletin MS08-039: Vulnerabilities in Outlook Web Access for Exchange Server Could Allow Elevation of Privilege (953747).
  • Microsoft Security Bulletin MS09-003: Vulnerabilities in Microsoft Exchange Could Allow Remote Code Execution (959239).
  • NORTEL BULLETIN ID: 2008008958, Rev 1: Centrex IP Client Manager (CICM) response to Microsoft July security bulletin .
  • ASA-2007-191: MS07-026 Vulnerabilities in Microsoft Exchange Could Allow Remote Code Execution (931832)
  • BID-23810: Microsoft Exchange IMAP Command Processing Remote Denial of Service Vulnerability
  • CVE-2007-0221: Integer overflow in the IMAP (IMAP4) support in Microsoft Exchange Server 2000 SP3 allows remote attackers to cause a denial of service (service hang) via crafted literals in an IMAP command, aka the IMAP Literal Processing Vulnerability.
  • OSVDB ID: 34392: Microsoft Exchange Server IMAP Literal Processing DoS
  • SA25183: Microsoft Exchange Multiple Vulnerabilities
  • SECTRACK ID: 1018015: Microsoft Exchange Base64, iCal, IMAP, and Attachment Processing Bugs Let Remote Users Deny Service or Execute Arbitrary Code

Platforms Affected:

  • Microsoft Exchange Server 2000 SP3
  • Microsoft Windows Vista

Reported:

May 08, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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