CVE-2020-15983 : Security Advisory and Response

Insufficient data validation in webUI in Google Chrome on ChromeOS prior to 86.0.4240.75 allowed a local attacker to bypass content security policy via a crafted HTML page.

Understanding CVE-2020-15983

This CVE involves a vulnerability in Google Chrome that could be exploited by a local attacker to bypass content security policy.

What is CVE-2020-15983?

CVE-2020-15983 is a security vulnerability in Google Chrome on ChromeOS that arises from insufficient data validation in the webUI, enabling a local attacker to bypass content security policy through a specifically crafted HTML page.

The Impact of CVE-2020-15983

The impact of this vulnerability is that a malicious actor with local access to the system could circumvent content security policy, potentially leading to further exploitation or unauthorized access.

Technical Details of CVE-2020-15983

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from inadequate data validation in the webUI component of Google Chrome on ChromeOS, allowing a local attacker to bypass content security policy using a malicious HTML page.

Affected Systems and Versions

Product: Chrome
Vendor: Google
Versions Affected: Less than 86.0.4240.75
Version Type: Custom

Exploitation Mechanism

The vulnerability can be exploited by a local attacker through a specifically crafted HTML page to bypass content security policy on ChromeOS systems running versions prior to 86.0.4240.75.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2020-15983, the following steps are recommended:

Immediate Steps to Take

Update Google Chrome to version 86.0.4240.75 or newer to mitigate the vulnerability.
Avoid visiting untrusted websites or clicking on suspicious links to reduce the risk of exploitation.

Long-Term Security Practices

Regularly update software and applications to the latest versions to patch known vulnerabilities.
Implement strong content security policies and practices to mitigate the impact of potential security flaws.

Patching and Updates

Stay informed about security advisories and updates from Google Chrome to apply patches promptly and enhance system security.