Actively exploited · Published Nov 4, 2011 · Assigned by microsoft
CVE-2011-3402
High 8.8 Exploited
In plain English
A high-severity security flaw in Windows from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on October 6, 2025). The chance it is exploited in the next 30 days is estimated at 78.1% (higher than 99.6% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Oct 27, 2025.
Official description
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 products (as reported)
References
- 49121 third-party-advisory, x_refsource_SECUNIA
- oval:org.mitre.oval:def:15645 vdb-entry, signature, x_refsource_OVAL
- TA12-164A third-party-advisory, x_refsource_CERT
- http://blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-files x_refsource_MISC
- 1027039 vdb-entry, x_refsource_SECTRACK
- 49122 third-party-advisory, x_refsource_SECUNIA
- MS11-087 vendor-advisory, x_refsource_MS
- http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf x_refsource_MISC
- TA11-347A third-party-advisory, x_refsource_CERT
- oval:org.mitre.oval:def:13998 vdb-entry, signature, x_refsource_OVAL
- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf x_refsource_MISC
- http://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two x_refsource_MISC
- http://technet.microsoft.com/security/advisory/2639658 x_refsource_CONFIRM
- MS12-034 vendor-advisory, x_refsource_MS
- MS12-039 vendor-advisory, x_refsource_MS
- oval:org.mitre.oval:def:15290 vdb-entry, signature, x_refsource_OVAL
- http://isc.sans.edu/diary/Duqu+Mitigation/11950 x_refsource_MISC
- http://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit x_refsource_MISC
- TA12-129A third-party-advisory, x_refsource_CERT
- http://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx x_refsource_CONFIRM
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-3402 government-resource