SARA / Free Tools / KEV / CVE-2019-1064

CVE-2019-1064 on CISA KEV

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change

CISA KEV — Actively Exploited

Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability

Vendor / Product
— / Microsoft / Windows
Added to KEV
2022-03-15
BOD 22-01 due
2022-04-05
Ransomware use
Known
CVSS / EPSS
7.8 HIGH · EPSS 12.42%

01What CISA says about this vulnerability

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could…

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

VendorProductVersions
MicrosoftWindows 10 Version 170310.0.0
MicrosoftWindows 10 Version 180310.0.0
MicrosoftWindows Server, version 1803 (Server Core Installation)10.0.0
MicrosoftWindows 10 Version 180910.0.17763.0
MicrosoftWindows 10 Version 180910.0.0
MicrosoftWindows Server 201910.0.17763.0
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0
MicrosoftWindows 10 Version 1709 for 32bit Systems — 10.0.0
MicrosoftWindows 10 Version 170910.0.0
MicrosoftWindows 10 Version 1903 for 32bit Systems — 10.0.0
MicrosoftWindows 10 Version 1903 for x64based Systems — 10.0.0
MicrosoftWindows 10 Version 1903 for ARM64based Systems — 10.0.0
MicrosoftWindows Server, version 1903 (Server Core installation)10.0.0
MicrosoftWindows 10 Version 160710.0.14393.0
MicrosoftWindows Server 201610.0.14393.0
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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