Link following in Avast Antivirus - CVE-2019-11230
Published: November 5, 2019
Vulnerability identifier: #VU22526
CSH Severity: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2019-11230
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Avast Antivirus
Avast Antivirus
Software vendor:
Avast Software s.r.o.
Avast Software s.r.o.
Description
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.
Remediation
Install updates from vendor's website.