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Microsoft Office Outlook Denial of Service Vulnerability (Mac OS X)
Information
Severity
Severity
Medium
Family
Family
Mac OS X Local Security Checks
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Mitigation
Created
Created
6 years ago
Modified
Modified
5 years ago
Summary
This host is installed with Microsoft Office Outlook and is prone to denial of service vulnerability.
Insight
Insight
The flaw is due to the XML parser in Microsoft Office does not properly detect recursion during entity expansion.
Affected Software
Affected Software
Microsoft Outlook 2011 on Mac OS X
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
A workaround is to add a rule blocking XML DTD Entities ('<!ENTITY', case-insensitive) to your spam filter. Creating an Outlook rule to permanently delete messages containing '<!ENTITY' also mitigates the attack.