CVE intelligence and bounded remediation
CVE-2019-0959 — An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory
An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by correcting how CLFS handles objects in memory.
- Severity
- High
- CVSS
- 7.8 (3.0)
- Published
- 2019-06-12
- CISA KEV
- Not currently listed
- Ecosystem
- windows/system
Affected products
- microsoft / windows_10 / 1803
- microsoft / windows_10 / 1809
- microsoft / windows_10 / 1903
- microsoft / windows_server_2016 / 1803
- microsoft / windows_server_2016 / 1903
- microsoft / windows_server_2019
Matched remediation archetype
Privilege escalation and unsafe privilege management
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
- Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
- Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.
Remediate safely
- Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
- Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
- Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.
Authoritative sources
Complete CVE record and remediation plan
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