CVE-2011-3402
Microsoft Windows Kernel contains an unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers that allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page.
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."
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-filesBroken Link
- blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspxVendor Advisory
- isc.sans.edu/diary/Duqu+Mitigation/11950Third Party Advisory
- secunia.com/advisories/49121Vendor Advisory
- secunia.com/advisories/49122Vendor Advisory
- technet.microsoft.com/security/advisory/2639658Vendor Advisory
- securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_TwoNot Applicable
- securitytracker.com/id?1027039Broken Link
- symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploitNot Applicable
- symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdfNot Applicable
- us-cert.gov/cas/techalerts/TA11-347A.htmlUS Government Resource
- us-cert.gov/cas/techalerts/TA12-129A.htmlUS Government Resource
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 365 days
- CVSS
- 8.8 HIGH
- EPSS (30-day exploit probability)
- 78.1% · top 1% of all CVEs
- Weakness
- NVD-CWE-noinfo
- Attack vector
- Network, remotely reachable
- 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.