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Sid 1-49422

Message

FILE-OTHER Microsoft Windows TrueType font parsing engine sfac_GetSbitBitmap elevation of privileges attempt

Summary

This event is generated when a specially crafted embedded Truetype font file designed to exploit CVE-2011-3402 is detected.

Impact

privilege escalation

CVE-2011-3402:

CVSS base score 9.3

CVSS impact score 10.0

CVSS exploitability score 8.6

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Detailed information

CVE-2011-3402: Unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page, as exploited in the wild in November 2011 by Duqu, aka "TrueType Font Parsing Vulnerability."

Affected systems

  • microsoft windows_7 -
  • microsoft windowsserver2003 *
  • microsoft windowsserver2008 *
  • microsoft windowsserver2008 -
  • microsoft windowsserver2008 r2
  • microsoft windows_vista *
  • microsoft windows_xp *

Ease of attack

CVE-2011-3402:

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

False positives

None known

False negatives

None known

Corrective action

Isolate the affected system and remediate it in accordance with your organization's incident response policies.

Contributors

  • Cisco Talos Intelligence Group

Additional References

  • technet.microsoft.com/en-us/security/bulletin/MS11-087