All vulnerabilities
CVE-2019-1253

Microsoft Windows AppX Deployment Server Privilege Escalation Vulnerability

Microsoft WindowsOperating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 15 Mar 2022. Known ransomware useCISA KEV
Exploit odds (EPSS)11.6%Chance of exploitation activity in the next 30 days, higher than 96% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline5 Apr 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 11 Sep 2019, 21:24 UTCPublishedCVE List
  2. 16 Sep 2019Exploit code publicExploit-DB
  3. 15 Mar 2022Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Local exploitAppXSvc - Privilege Escalation 16 Sep 2019Exploit-DB

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

A privilege escalation vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.

Text from CVE List

Affected versions 18

  • Windowsaffected: 10 Version 1703 for 32-bit SystemsCVE List
  • Windowsaffected: 10 Version 1703 for x64-based SystemsCVE List
  • Windowsaffected: 10 Version 1709 for 32-bit SystemsCVE List
  • Windowsaffected: 10 Version 1709 for x64-based SystemsCVE List
  • Windowsaffected: 10 Version 1803 for 32-bit SystemsCVE List
  • Windowsaffected: 10 Version 1803 for x64-based SystemsCVE List
  • Windowsaffected: 10 Version 1803 for ARM64-based SystemsCVE List
  • Windowsaffected: 10 Version 1809 for 32-bit SystemsCVE List
  • Windowsaffected: 10 Version 1809 for x64-based SystemsCVE List
  • Windowsaffected: 10 Version 1809 for ARM64-based SystemsCVE List
  • Windowsaffected: 10 Version 1709 for ARM64-based SystemsCVE List
  • Windows Serveraffected: version 1803 (Core Installation)CVE List
  • Windows Serveraffected: 2019CVE List
  • Windows Serveraffected: 2019 (Core installation)CVE List
  • Windows 10 Version 1903 for 32-bit Systemsaffected: unspecifiedCVE List
  • Windows 10 Version 1903 for x64-based Systemsaffected: unspecifiedCVE List
  • Windows 10 Version 1903 for ARM64-based Systemsaffected: unspecifiedCVE List
  • Windows Server, version 1903 (Server Core installation)affected: unspecifiedCVE List

References 3