CVE-2017-8307 : Vulnerability Insights and Analysis

Avast Antivirus before version 17 is vulnerable to a flaw in the LPC interface API provided by the AvastSVC.exe Windows service, allowing unauthorized launching of binaries and file manipulation.

Understanding CVE-2017-8307

This CVE entry highlights a security vulnerability in Avast Antivirus that can lead to Denial of Service attacks and data concealment.

What is CVE-2017-8307?

The vulnerability in Avast Antivirus version 17 and earlier enables users to execute predefined binaries and modify or delete files through the AvastSVC.exe Windows service. Exploitation is possible when Avast Self-Defense is inactive, and in conjunction with CVE-2017-8308 when Self-Defense is active.

The Impact of CVE-2017-8307

Exploiting this vulnerability can result in Denial of Service attacks and the covering up of evidence related to potential cyber threats.

Technical Details of CVE-2017-8307

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw allows unauthorized users to launch predefined binaries and manipulate files via the AvastSVC.exe Windows service.

Affected Systems and Versions

Product: Avast Antivirus
Vendor: Avast
Versions affected: Prior to version 17

Exploitation Mechanism

Unauthorized launching of binaries
File replacement or deletion
Requires Avast Self-Defense to be inactive for exploitation
Can be exploited in conjunction with CVE-2017-8308 when Self-Defense is active

Mitigation and Prevention

Protecting systems from CVE-2017-8307 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Avast Antivirus to version 17 or newer
Ensure Avast Self-Defense is active
Monitor system for any suspicious activities

Long-Term Security Practices

Regularly update antivirus software
Implement least privilege access controls
Conduct security audits and penetration testing

Patching and Updates

Apply patches and updates provided by Avast to fix the vulnerability