VulnerabilityAnalyzed
CVE-2016-7255
Microsoft Win32k Privilege Escalation Vulnerability
KEVHIGH 7.8EPSS 81.0%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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, Windows 10 Gold, 1511, and 1607, and Windows Server 2016 allow local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability."
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 80.97% probability · 100th percentile
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022 · used in ransomware campaigns
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1511 · microsoft/windows 10 1607 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows vista
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2016-7255
References
- http://blog.trendmicro.com/trendlabs-security-intelligence/one-bit-rule-system-analyzing-cve-2016-7255-exploit-wild/Broken Link
- http://packetstormsecurity.com/files/140468/Microsoft-Windows-Kernel-win32k.sys-NtSetWindowLongPtr-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/94064Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037251Broken Link, Third Party Advisory, VDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-135Patch, Vendor Advisory
- https://github.com/mwrlabs/CVE-2016-7255Exploit, Third Party Advisory
- https://securingtomorrow.mcafee.com/mcafee-labs/digging-windows-kernel-privilege-escalation-vulnerability-cve-2016-7255/Broken Link
- https://security.googleblog.com/2016/10/disclosing-vulnerabilities-to-protect.htmlThird Party Advisory
- https://www.exploit-db.com/exploits/40745/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40823/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41015/Exploit, Third Party Advisory, VDB Entry
- http://blog.trendmicro.com/trendlabs-security-intelligence/one-bit-rule-system-analyzing-cve-2016-7255-exploit-wild/Broken Link
- http://packetstormsecurity.com/files/140468/Microsoft-Windows-Kernel-win32k.sys-NtSetWindowLongPtr-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/94064Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037251Broken Link, Third Party Advisory, VDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-135Patch, Vendor Advisory
- https://github.com/mwrlabs/CVE-2016-7255Exploit, Third Party Advisory
- https://securingtomorrow.mcafee.com/mcafee-labs/digging-windows-kernel-privilege-escalation-vulnerability-cve-2016-7255/Broken Link
- https://security.googleblog.com/2016/10/disclosing-vulnerabilities-to-protect.htmlThird Party Advisory
- https://www.exploit-db.com/exploits/40745/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40823/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41015/Exploit, Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-7255US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.