CVE-2019-11230 Information

Description

In Avast Antivirus before 19.4 a local administrator can trick the product into renaming arbitrary files by replacing the Logs\Update.log file with a symlink. The next time the product attempts to write to the log file the target of the symlink is renamed. This defect can be exploited to rename a critical product file (e.g. AvastSvc.exe) causing the product to fail to start on the next system restart.

CVSS Vector

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

Reference

http://www.mcerlane.co.uk/CVE-2019-11230/ http://www.securityfocus.com/bid/109344

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

4.4