CVE-2020-15262 : Vulnerability Insights and Analysis

In webpack-subresource-integrity before version 1.5.1, all dynamically loaded chunks receive an invalid integrity hash that is ignored by the browser, affecting the validation process. This issue is patched in version 1.5.1.

Understanding CVE-2020-15262

In this CVE, webpack-subresource-integrity versions prior to 1.5.1 have a vulnerability that impacts the integrity verification of dynamically loaded chunks.

What is CVE-2020-15262?

The vulnerability in webpack-subresource-integrity before version 1.5.1 causes dynamically loaded chunks to have invalid integrity hashes, leading to the browser's inability to validate their integrity.
This issue removes the additional protection level offered by Subresource Integrity (SRI) for these chunks, while top-level chunks remain unaffected.

The Impact of CVE-2020-15262

CVSS Score: 3.7 (Low Severity)
Attack Vector: Network
Attack Complexity: High
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
User Interaction: None
Scope: Unchanged

Technical Details of CVE-2020-15262

The technical details of the vulnerability in webpack-subresource-integrity.

Vulnerability Description

The issue lies in the incorrect generation of integrity hashes for dynamically loaded chunks, rendering them unverifiable by the browser.

Affected Systems and Versions

Affected Product: webpack-subresource-integrity
Vendor: waysact
Vulnerable Versions: < 1.5.1

Exploitation Mechanism

Attackers can exploit this vulnerability by loading malicious code in dynamically loaded chunks, bypassing integrity checks.

Mitigation and Prevention

Protect your systems from the CVE-2020-15262 vulnerability.

Immediate Steps to Take

Update webpack-subresource-integrity to version 1.5.1 or later to patch the vulnerability.
Monitor for any unusual behavior in dynamically loaded chunks.

Long-Term Security Practices

Implement regular security audits to identify and address vulnerabilities promptly.
Educate developers on secure coding practices to prevent similar issues in the future.

Patching and Updates

Stay informed about security advisories and promptly apply patches to mitigate known vulnerabilities.