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CVE

CVE-2016-3309

Microsoft Windows Kernel Privilege Escalation Vulnerability

The kernel-mode drivers in Microsoft Windows Vista SP2.

Windows Server 2008 SP2 and R2 SP1.

Windows 7 SP1.

Windows 8.1.

Windows Server 2012 Gold and R2.

Windows RT 8.1.

and Windows 10 Gold, 1511, and 1607 allow local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability," a different vulnerability than CVE-2016-3308, CVE-2016-3310, and CVE-2016-3311.

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.43241 Ransomware: known
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • Linked to known ransomware campaigns
  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

▤

Affected Products & Versions

9
microsoft windows 10 1507all versions
microsoft windows 10 1511all versions
microsoft windows 10 1607all versions
microsoft windows 7all versions
microsoft windows 8.1all versions
microsoft windows rt 8.1all versions
microsoft windows server 2008all versions
microsoft windows server 2012all versions
⚠

Public Exploits & PoCs

2
localMicrosoft Windows 10 RS2 (x64) - 'win32kfull!bFill' Pool Overflow2017-10-06
pocwww.exploit-db.com · 42960www.exploit-db.com
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Aug 2016 · 09:59 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
cisaKEV-CVE-2016-3309
msrcCVE-2016-3309Elevation of Privilege
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/92297Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1036572Broken LinkThird Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-098PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-3309US Government Resource
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