Code Injection in inSync Client for Windows and inSync Client for Mac - CVE-2019-4001
Published: February 25, 2020 / Updated: November 30, 2020
Vulnerability identifier: #VU48701
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-4001
CWE-ID: CWE-94
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation. The inSync Electron application is configured in such a way that a malicious local user can execute arbitrary NodeJS code in the context of the inSync client process. An attacker can accomplish this by launching inSync with a URL parameter pointing to an attacker-controlled HTML file containing NodeJS code.
Affected software
inSync Client for Windows
inSync Client for Mac
inSync Client for Mac
How to mitigate CVE-2019-4001
Install updates from vendor's website.
inSync Client for Windows - update to 6.6.0
inSync Client for Mac - update to 6.6.0
inSync Client for Mac - update to 6.6.0