Microsoft Exchange iCal MODPROPS denial of service
| exchange-ical-dos (33888) |  Medium Risk |
Description:
Microsoft Exchange is vulnerable to a denial of service attack, caused by an error in the CDOEX functionality. A remote attacker could send an email containing a specially-crafted iCal file 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 The original bulletin issued by Microsoft has been superseded.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:
- Full-Disclosure Mailing List, Tue May 08 2007 - 18:01:14 CDT: Exchange Calendar MODPROPS Denial of Service (CVE-2007-0039).
- 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-23808: Microsoft Exchange iCal Request Remote Denial of Service Vulnerability
- CVE-2007-0039: The Exchange Collaboration Data Objects (EXCDO) functionality in Microsoft Exchange Server 2000 SP3, 2003 SP1 and SP2, and 2007 allows remote attackers to cause a denial of service (crash) via an Internet Calendar (iCal) file containing multiple X-MICROSOFT-CDO-MODPROPS (MODPROPS) properties in which the second MODPROPS is longer than the first, which triggers a NULL pointer dereference and an unhandled exception.
- OSVDB ID: 34390: Microsoft Exchange Server MODPROPS Malformed iCal 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
- VUPEN/ADV-2007-1711: Microsoft Exchange Code Execution and Denial of Service Vulnerabilities (MS07-026)
Platforms Affected:
- Microsoft Exchange Server 2000 SP3
- Microsoft Exchange Server 2003 SP2
- Microsoft Exchange Server 2003 SP1
- Microsoft Exchange Server 2007
- Microsoft Windows Vista
Reported:
May 08, 2007
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.