Sep 2019:
CVE-2019-1253 Published on September 11, 2019

An elevation of privilege vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1215, CVE-2019-1278, CVE-2019-1303.

NVD

Known Exploited Vulnerability

This Microsoft Windows AppX Deployment Server Privilege Escalation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. A privilege escalation vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.

The following remediation steps are recommended / required by April 5, 2022: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2019-1253 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is an insecure temporary file Vulnerability?

The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

CVE-2019-1253 has been classified to as an insecure temporary file vulnerability or weakness.


Products Associated with CVE-2019-1253

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Microsoft Windows 10
 
Microsoft Windows Server 2016
 
Microsoft Windows Server 2019
 
Microsoft Windows Server 1803
 
Microsoft Windows 10 1703
 
Microsoft Windows 10 1709
 
Microsoft Windows 10 1803
 
Microsoft Windows 10 1903
 
Microsoft Windows Server 1903
 
Microsoft Windows
 
Microsoft Windows Server
 

Affected Versions

Microsoft Windows: Microsoft Windows Server: Microsoft Windows 10 Version 1903 for 32-bit Systems: Microsoft Windows 10 Version 1903 for x64-based Systems: Microsoft Windows 10 Version 1903 for ARM64-based Systems: Microsoft Windows Server, version 1903 (Server Core installation):

Exploit Probability

EPSS
30.23%
Percentile
96.57%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.