CVE-2017-18077 : Vulnerability Insights and Analysis

The version of index.js in brace-expansion prior to 1.1.7 is susceptible to Regular Expression Denial of Service (ReDoS) attacks when an expand argument includes numerous comma characters.

Understanding CVE-2017-18077

This CVE identifies a vulnerability in brace-expansion that can be exploited to launch ReDoS attacks.

What is CVE-2017-18077?

CVE-2017-18077 refers to a security flaw in brace-expansion's index.js file before version 1.1.7, making it prone to ReDoS attacks.

The Impact of CVE-2017-18077

The vulnerability allows attackers to potentially disrupt the application's functionality by exploiting the ReDoS weakness in brace-expansion.

Technical Details of CVE-2017-18077

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability in index.js of brace-expansion before 1.1.7 enables ReDoS attacks through the manipulation of expand arguments.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting expand arguments with a high volume of comma characters.

Mitigation and Prevention

Protective measures to address CVE-2017-18077.

Immediate Steps to Take

Update brace-expansion to version 1.1.7 or later to mitigate the vulnerability.
Avoid using expand arguments with excessive comma characters.

Long-Term Security Practices

Regularly monitor for security advisories related to brace-expansion.
Implement input validation to prevent malicious input manipulation.

Patching and Updates

Apply patches promptly to ensure that known vulnerabilities are addressed in a timely manner.