| Business Impact: |
Out of the two vulnerabilities released in MS09-003, this issue is the more serious vulnerability of the two and is caused by invalid decoding of Transport Neutral Encapsulation (TNEF) messages. TNEF is a format used by the Microsoft Exchange Server when sending messages as Rich Text Format (RTF). Successful exploitation could result in remote code execution on the Exchange Server when the message is viewed by a user. IBM X-Force considers this to be the most serious bulletin in this month’s patch release. |
| CVSS |
Base Score: |
10 |
| |
Access Vector: |
Network |
| Access Complexity: |
Low |
| Authentication: |
None |
| Confidentiality Impact: |
Complete |
| Integrity Impact: |
Complete |
| Availability Impact: |
Complete |
|
|
| Adjusted Temporal Score: |
7.4 |
| |
Exploitability: |
Unproven |
| Remediation Level: |
Official-Fix |
| Report Confidence: |
Confirmed |
| Affected Products: |
For a full list of affected versions, see references below. |
| Technical Description: |
Microsoft Exchange Server could allow a remote attacker to execute arbitrary code on the system, caused by improper decoding of Transport Neutral Encapsulation Format (TNEF) message data. By sending a specially-crafted TNEF message to a vulnerable Exchange Server, a remote attacker could exploit this vulnerability to corrupt memory and execute arbitrary code on the system, once the Exchange Server Information Store processes the message or a victim opens the message. |
| Remediation: |
Patches are available. See references for details. |
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* 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.
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