What is CVE-2019-1214?

CVE-2019-1214 is a high-severity vulnerability in Microsoft Windows, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2019-09-11.

How severe is CVE-2019-1214?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2019-1214 known to be exploited?

Yes. CVE-2019-1214 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Buffer overflow in Microsoft Windows

CVE-2019-1214

An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory, aka 'Windows Common Log File System Driver Elevation of Privilege Vulnerability'.

Vulnerability class: Buffer Overflow

EPSS: 0.014 (69.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Windows — versions 7 for 32-bit Systems Service Pack 1, 7 for x64-based Systems Service Pack 1, 8.1 for 32-bit systems
Microsoft Windows_10_1507
Microsoft Windows_10_1607
Microsoft Windows_10_1703
Microsoft Windows_10_1709
Microsoft Windows_10_1803
Microsoft Windows_10_1809
Microsoft Windows_10_1903
Microsoft Windows 10 Version 1903 For 32-bit Systems — versions unspecified
Microsoft Windows 10 Version 1903 For Arm64-based Systems — versions unspecified

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

secure@microsoft.com (Patch, x_refsource_MISC, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2019-1214?: CVE-2019-1214 is a high-severity vulnerability in Microsoft Windows, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2019-09-11.
How severe is CVE-2019-1214?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2019-1214 known to be exploited?: Yes. CVE-2019-1214 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.