Link following in Avast Antivirus - CVE-2019-11230
Published: November 5, 2019
Vulnerability identifier: #VU22526
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11230
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to the . A local authenticated administrator can replace the "LogsUpdate.log" file with a symlink, trick the product into renaming arbitrary files and cause a denial of service on the target system.
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.
Affected software
Avast Antivirus
How to mitigate CVE-2019-11230
Install updates from vendor's website.
Avast Antivirus - update to 19.4.2374