Permissions, Privileges, and Access Controls in Avast Antivirus - CVE-2020-10862
Published: April 2, 2020
Vulnerability identifier: #VU26540
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-10862
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to escalate privileges on the system.
The vulnerability exists due to improper permission checks in the aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe). A local attacker can gain elevated privileges via RPC on the target system.
Affected software
Avast Antivirus
How to mitigate CVE-2020-10862
Install updates from vendor's website.
Avast Antivirus - update to 20.1.2397