CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
96.1%
Microsoft Excel contains a vulnerability in the handling of malformed STYLE records, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.
Microsoft Excel contains a vulnerability that could be exploited when Excel opens a specially crafted document. The vulnerability is caused by incorrect handling of malformed STYLE records. This vulnerability affects both Windows and Mac versions of Excel
By convincing a user to open a specially crafted Excel document, an attacker could execute arbitrary code with the privileges of the user running Excel. If the user is logged in with administrative privileges, the attacker could take complete control of a vulnerable system. This vulnerability may also cause Excel to crash.
Apply an update
This vulnerability is addressed in Microsoft Security Bulletin MS06-059.
Do not open untrusted Excel documents
Do not open unfamiliar or unexpected Excel or other Office documents, particularly those hosted on web sites or delivered as email attachments. Please see Cyber Security Tip ST04-010.
Disable automatic opening of Excel documents
By default, Excel 97 and Excel 2000 will configure Internet Explorer to automatically open Excel documents. This feature can be disabled by using the Office Document Open Confirmation Tool. Mozilla Firefox users should disable automatic opening of files, as specified in the Securing Your Web Browser document.
Do not rely on file name extension filtering
In most cases, Windows will call Excel to open a document even if the document has an unknown file extension. For example, if spreadsheet.qwer
contains the correct file header information, Windows will open presentation.qwer
with Excel. Filtering for common extensions (e.g., .xls and .xlt) will not detect all Excel documents. Additionally, a Excel file with no file extension will also open with the Excel application.
143292
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Updated: October 10, 2006
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Please see Microsoft Security Bulletin MS06-059.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23143292 Feedback>).
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
This vulnerability was publicly reported by Nanika.
This document was written by Will Dormann.
CVE IDs: | CVE-2006-3431 |
---|---|
Severity Metric: | 37.44 Date Public: |