CVE-2019-11644 Information

Description

In the F-Secure installer in F-Secure SAFE for Windows before 17.6 F-Secure Internet Security before 17.6 F-Secure Anti-Virus before 17.6 F-Secure Client Security Standard and Premium before 14.10 F-Secure PSB Workstation Security before 12.01 and F-Secure Computer Protection Standard and Premium before 19.3 a local user can escalate their privileges through a DLL hijacking attack against the installer. The installer writes the file rm.exe to C:\Windows\Temp and then executes it. The rm.exe process then attempts to load several DLLs from its current directory. Non-admin users are able to write to this folder so an attacker can create a malicious C:\Windows\Temp\OLEACC.dll file. When an admin runs the installer rm.exe will execute the attacker’s DLL in an elevated security context.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://www.f-secure.com/en/web/labs_global/fsc-2019-2

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8