CVE-2021-39157 : Vulnerability Insights and Analysis

Detect-character-encoding v0.6.0 and earlier allows a denial of service (DoS) due to a Node.js process crash when handling certain data, impacting availability.

Understanding CVE-2021-39157

This CVE involves an open-source library, detect-character-encoding, with a vulnerability in versions prior to v0.7.0 that can lead to a DoS condition.

What is CVE-2021-39157?

The vulnerability in detect-character-encoding v0.6.0 and below triggers a Node.js process crash when encountering specific data with no charset, disrupting service availability.

The Impact of CVE-2021-39157

The vulnerability in detect-character-encoding can have the following impact:

Availability: High impact with the potential for a denial of service due to the Node.js process crash.

Technical Details of CVE-2021-39157

This section covers the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in detect-character-encoding v0.6.0 and earlier leads to a DoS by crashing the Node.js process when facing data without a charset match.

Affected Systems and Versions

Affected Versions: < 0.7.0 of detect-character-encoding

Exploitation Mechanism

Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the impact of CVE-2021-39157 and prevent potential exploitation.

Immediate Steps to Take

Upgrade to detect-character-encoding v0.7.0 or higher to eliminate the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Monitor security advisories for any new vulnerabilities.

Patching and Updates

All users are strongly advised to update to detect-character-encoding v0.7.0 or later to address this vulnerability.