CVE-2019-5864 : Exploit Details and Defense Strategies

Google Chrome before version 76.0.3809.87 had a vulnerability in the CORS feature that allowed attackers to bypass content security policies via malicious extensions.

Understanding CVE-2019-5864

Before version 76.0.3809.87, a lack of data validation in CORS in Google Chrome enabled attackers to exploit the browser's security.

What is CVE-2019-5864?

Insufficient data validation in the Cross-Origin Resource Sharing (CORS) feature of Google Chrome allowed attackers to trick users into installing harmful extensions.
Attackers could bypass the content security policy by using a carefully crafted Chrome Extension.

The Impact of CVE-2019-5864

Attackers could execute malicious activities by exploiting this vulnerability, potentially compromising user data and system integrity.

Technical Details of CVE-2019-5864

Google Chrome's vulnerability in the CORS feature had the following technical details:

Vulnerability Description

Insufficient data validation in CORS allowed attackers to bypass content security policies through malicious extensions.

Affected Systems and Versions

Product: Chrome
Vendor: Google
Versions Affected: < 76.0.3809.87

Exploitation Mechanism

Attackers could exploit the vulnerability by convincing users to install a harmful extension, enabling them to bypass the browser's content security policy.

Mitigation and Prevention

To address CVE-2019-5864, consider the following steps:

Immediate Steps to Take

Update Google Chrome to version 76.0.3809.87 or higher to mitigate the vulnerability.
Be cautious when installing browser extensions and only use trusted sources.

Long-Term Security Practices

Regularly update Chrome and all installed extensions to the latest versions.
Educate users on safe browsing practices and the risks associated with installing unverified extensions.

Patching and Updates

Google released a patch in version 76.0.3809.87 to address this vulnerability.