CVE-2017-0263: Microsoft Win32k Privilege Escalation Vulnerability

CVE-2017-0263 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-02-10

Microsoft Win32k kernel-mode drivers contain a use-after-free vulnerability (CWE-416) that allows local users to escalate privileges. An attacker can exploit this by running a specially crafted application to gain elevated system permissions.

Technologies: Microsoft Win32K. Vendors: Microsoft.

Quick answers

Is CVE-2017-0263 exploited in the wild?
Yes. CVE-2017-0263 is known to be exploited in the wild, first recorded on 10 February 2022. Treat it as urgent.
How severe is CVE-2017-0263?
Critical severity, with a CVSS score of 7.8, published 10 February 2022.
Which products and versions are affected?
Microsoft Windows Server 2008 SP2, R2 SP1; Microsoft Windows 7 SP1; Microsoft Windows 8.1 Gold; Microsoft Windows Server 2012 Gold, R2; and 3 more.
Is there a fix for CVE-2017-0263?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2017-0263 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2017-0263?
Check whether you run Microsoft Win32K. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Microsoft Windows Server 2008 SP2, R2 SP1
  • Microsoft Windows 7 SP1
  • Microsoft Windows 8.1 Gold
  • Microsoft Windows Server 2012 Gold, R2
  • Microsoft Windows RT 8.1 Gold
  • Microsoft Windows 10 Gold, 1511, 1607, 1703
  • Microsoft Windows Server 2016 Gold

Timeline

  • 2017-05-09: advisory: MSRC advisory published (based on BID 98258 date)
  • 2022-02-10: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-02-10: disclosed: NVD publication date
  • 2022-08-10: other: CISA KEV remediation due date

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