Vulnerability Name:

CCN-177992

Published:2020-03-18
Updated:2020-03-18
Summary:Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by improper hard link handling by the the AppX Deployment Service. By creating a specially-crafted hard link, an authenticated attacker could exploit this vulnerability to gain elevated privileges and execute code in the context of SYSTEM.
CVSS v3 Severity:7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Consequences:Gain Privileges
References:Source: XF
Type: UNKNOWN
ms-windows-appx-priv-esc(177992)

Source: CCN
Type: Microsoft Web site
Microsoft Windows

Source: CCN
Type: ZDI-20-313
Microsoft Windows AppX Deployment Service Hard Link Privilege Escalation Vulnerability

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/o:microsoft:windows:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    microsoft windows *