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Sid 1-46196

Message

FILE-OFFICE Microsoft Office Excel named range cell content use-after-free attempt

Summary

This event is generated when a crafted Microsoft Excel document is found traversing the network.

Impact

Attempted User Privilege Gain

CVE-2018-0920:

CVSS base score 7.8

CVSS impact score 5.9

CVSS exploitability score 1.8

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Detailed information

Microsoft Office Excel contains a use-after-free vulnerability that can allow an attacker remote code execution through use of a crafted Excel file. CVE-2018-0920: A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka "Microsoft Excel Remote Code Execution Vulnerability." This affects Microsoft Excel. This CVE ID is unique from CVE-2018-1011, CVE-2018-1027, CVE-2018-1029.

Affected systems

  • microsoft excel 2010

Ease of attack

CVE-2018-0920:

Access Vector

Access Complexity

Authentication

False positives

None known.

False negatives

None known.

Corrective action

Follow corporate patch and update policies. Update MS Office as soon as possible.

Contributors

  • Cisco's Talos Intelligence Group

Additional References

  • portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-0920