CVE intelligence and bounded remediation

CVE-2019-1385 — Microsoft Windows AppX Deployment Extensions Privilege Escalation Vulnerability

High CVSS 7.8 CISA KEV

An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.To exploit this vulnerability, an authenticated attacker would need to run a specially crafted application to elevate privileges.The security update addresses the vulnerability by correcting how AppX Deployment Extensions manages privileges., aka 'Windows AppX Deployment Extensions Elevation of Privilege Vulnerability'.

Severity
High
CVSS
7.8 (3.1)
Published
2019-11-12
CISA KEV
Known exploited
Ecosystem
windows/system
Weaknesses
CWE-59

Affected products

  • microsoft / windows_10_1709
  • microsoft / windows_10_1803
  • microsoft / windows_10_1809
  • microsoft / windows_10_1903
  • microsoft / windows_server_2016
  • microsoft / windows_server_2019

Matched remediation archetype

Path traversal, unsafe upload, and file handling

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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