Improper access control in Avast Antivirus - CVE-2020-10865

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Main Vulnerability Database Vulnerabilities #VU26537

Improper access control in Avast Antivirus - CVE-2020-10865

Published: April 2, 2020


Vulnerability identifier: #VU26537
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-10865
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Avast Software s.r.o.
Affected software:
Avast Antivirus

Detailed vulnerability description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe). A remote attacker can bypass implemented security restrictions and make arbitrary changes to the Components section of the "Stats.ini" file via RPC from a Low Integrity process.


How to mitigate CVE-2020-10865

Install updates from vendor's website.

Sources