SARA / Free Tools / KEV / CVE-2019-1129

CVE-2019-1129 on CISA KEV

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1130.

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
· EPSS 2.44%

01What CISA says about this vulnerability

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1130.

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
MicrosoftWindows10 Version 1703 for 32-bit Systems, 10 Version 1703 for x64-based Systems, 10 Version 1709 for 32-bit Systems, 10 Version 1709 for x64-based Systems, 10 Version 1803 for 32-bit Systems, 10 Version 1803 for x64-based Systems, 10 Version 1803 for ARM64-based Systems, 10 Version 1809 for 32-bit Systems, 10 Version 1809 for x64-based Systems, 10 Version 1809 for ARM64-based Systems, 10 Version 1709 for ARM64-based Systems
MicrosoftWindows Serverversion 1803 (Core Installation), 2019, 2019 (Core installation)
MicrosoftWindows 10 Version 1903 for 32bit Systems — unspecified
MicrosoftWindows 10 Version 1903 for x64based Systems — unspecified
MicrosoftWindows 10 Version 1903 for ARM64based Systems — unspecified
MicrosoftWindows Server, version 1903 (Server Core installation)unspecified

06Detection

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

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