CVE-2017-5033 : Security Advisory and Response

Google Chrome prior to version 57.0.2987.98 for Mac, Windows, and Linux, and 57.0.2987.108 for Android had a vulnerability in Blink that allowed remote attackers to bypass content security policy (CSP) restrictions.

Understanding CVE-2017-5033

This CVE relates to a flaw in Google Chrome that could be exploited by attackers to circumvent CSP restrictions.

What is CVE-2017-5033?

Prior to the specified versions, Google Chrome's Blink had a flaw that prevented the correct application of CSP restrictions to local scheme pages, enabling attackers to bypass CSP using a specially crafted HTML page.

The Impact of CVE-2017-5033

This vulnerability could be exploited by remote attackers to bypass content security policy, potentially leading to unauthorized access or other malicious activities.

Technical Details of CVE-2017-5033

Google Chrome's vulnerability in Blink allowed for the bypassing of CSP restrictions.

Vulnerability Description

The flaw in Blink failed to propagate CSP restrictions to local scheme pages, enabling attackers to bypass CSP using a crafted HTML page.

Affected Systems and Versions

Google Chrome prior to 57.0.2987.98 for Mac, Windows, and Linux
Google Chrome 57.0.2987.108 for Android

Exploitation Mechanism

Attackers could exploit this vulnerability by using a specially crafted HTML page containing the unsafe-inline keyword to bypass CSP restrictions.

Mitigation and Prevention

To address CVE-2017-5033, follow these steps:

Immediate Steps to Take

Update Google Chrome to version 57.0.2987.98 for Mac, Windows, and Linux, and 57.0.2987.108 for Android
Avoid visiting untrusted websites or clicking on suspicious links

Long-Term Security Practices

Regularly update software and applications to the latest versions
Implement a robust security policy and regularly educate users on cybersecurity best practices

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities