CVE-2019-18893 : Security Advisory and Response
Learn about CVE-2019-18893, a cross-site scripting vulnerability in the Video Downloader component of Avast Secure Browser and AVG Secure Browser, allowing websites to execute code within the browser context. Find mitigation steps and preventive measures.
A potential vulnerability in the Video Downloader component of Avast Secure Browser and AVG Secure Browser could allow websites to execute code within the component, posing a security risk.
Understanding CVE-2019-18893
This CVE identifies a cross-site scripting (XSS) vulnerability in the Video Downloader component of the mentioned browsers.
What is CVE-2019-18893?
The vulnerability allows websites to run their own code within the Video Downloader component, which has extensive permissions, including accessing cookies, browsing history, monitoring user activities, and modifying browsing experiences.
The Impact of CVE-2019-18893
Exploitation of this vulnerability could lead to unauthorized code execution within the browser context, potentially compromising user data and privacy.
Technical Details of CVE-2019-18893
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The XSS vulnerability in the Video Downloader component of Avast Secure Browser and AVG Secure Browser versions 77.1.1831.91 and 77.0.1790.77 allows websites to execute code within the component, leveraging its broad permissions.
Affected Systems and Versions
- Avast Secure Browser version 77.1.1831.91
- AVG Secure Browser version 77.0.1790.77
Exploitation Mechanism
Websites can exploit this vulnerability to inject and execute malicious code within the Video Downloader component, potentially compromising user data and activities.
Mitigation and Prevention
Protecting systems from CVE-2019-18893 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable or remove the Video Downloader component from the affected browsers.
- Regularly update browsers to the latest versions to patch known vulnerabilities.
Long-Term Security Practices
- Avoid visiting untrusted websites to minimize exposure to potential attacks.
- Implement browser security extensions or plugins to enhance protection against XSS and other threats.
Patching and Updates
- Stay informed about security updates for Avast Secure Browser and AVG Secure Browser.
- Apply patches promptly to address known vulnerabilities and enhance overall system security.