CVE-2020-13657 : Vulnerability Insights and Analysis

An elevation of privilege vulnerability exists in Avast Free Antivirus and AVG AntiVirus Free before 20.4 due to improperly handling hard links, allowing local users to take control of arbitrary files.

Understanding CVE-2020-13657

This CVE identifies a security flaw in Avast and AVG antivirus software that could lead to an elevation of privilege attack.

What is CVE-2020-13657?

The vulnerability in Avast Free Antivirus and AVG AntiVirus Free before version 20.4 arises from the incorrect handling of hard links, enabling local users to manipulate arbitrary files on the system.

The Impact of CVE-2020-13657

The exploitation of this vulnerability could result in local users gaining unauthorized control over sensitive files, potentially leading to further system compromise or data theft.

Technical Details of CVE-2020-13657

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability allows local users to exploit the improper handling of hard links in Avast and AVG antivirus software, leading to an elevation of privilege.

Affected Systems and Versions

Affected Systems: Avast Free Antivirus and AVG AntiVirus Free
Vulnerable Versions: Versions prior to 20.4

Exploitation Mechanism

By manipulating hard links within the software, local users can escalate their privileges and gain control over files they should not have access to.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate action and long-term security practices.

Immediate Steps to Take

Update Avast Free Antivirus and AVG AntiVirus Free to version 20.4 or newer to mitigate the vulnerability.
Monitor system logs for any suspicious activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access rights and minimize the impact of potential privilege escalation attacks.
Regularly educate users on safe computing practices to prevent unauthorized access to sensitive files.

Patching and Updates

Stay vigilant for security updates from Avast and AVG to address vulnerabilities promptly and ensure the ongoing protection of your systems.