CVE-2020-28469 : Exploit Details and Defense Strategies

This CVE involves a vulnerability in the package glob-parent before version 5.1.2, leading to Regular Expression Denial of Service (ReDoS) due to a flawed enclosure regex.

Understanding CVE-2020-28469

This vulnerability, identified as Regular Expression Denial of Service (ReDoS), affects the glob-parent package before version 5.1.2.

What is CVE-2020-28469?

CVE-2020-28469 is a security vulnerability in the glob-parent package that allows Regular Expression Denial of Service (ReDoS) attacks due to a faulty enclosure regex.

The Impact of CVE-2020-28469

The impact of this CVE is rated as MEDIUM with a CVSS base score of 5.3. It can be exploited with low attack complexity and network access, affecting availability but not confidentiality or integrity.

Technical Details of CVE-2020-28469

This section provides technical details of the CVE.

Vulnerability Description

The vulnerability lies in the glob-parent package before version 5.1.2, where the enclosure regex used to check for strings ending in enclosure containing path separator is flawed, allowing for ReDoS attacks.

Affected Systems and Versions

Product: glob-parent
Vendor: n/a
Versions Affected: < 5.1.2

Exploitation Mechanism

The vulnerability can be exploited by crafting malicious inputs that trigger the flawed enclosure regex, causing the system to hang or become unresponsive.

Mitigation and Prevention

Protect your systems from CVE-2020-28469 with the following measures.

Immediate Steps to Take

Update the glob-parent package to version 5.1.2 or higher to mitigate the vulnerability.
Monitor and restrict user inputs to prevent malicious regex patterns.

Long-Term Security Practices

Regularly update packages and dependencies to patch known vulnerabilities.
Implement input validation and sanitization to prevent regex-based attacks.

Patching and Updates

Stay informed about security alerts and updates related to the glob-parent package.