CVE-2021-41615 : What You Need to Know

GoAhead WebServer 2.1.8 is affected by an insufficient nonce entropy vulnerability that could lead to security issues. Learn more about the impact, technical details, and mitigation steps.

Understanding CVE-2021-41615

GoAhead WebServer 2.1.8 vulnerability due to insufficient nonce entropy.

What is CVE-2021-41615?

The vulnerability exists in websda.c in GoAhead WebServer 2.1.8
It stems from the nonce calculation relying on a hardcoded value, lacking entropy needed for robust security
The use of a non-random value violates guidelines for secure HTTP Digest Access Authentication

The Impact of CVE-2021-41615

The vulnerability could be exploited to compromise authentication security
Websda.c code is present in derivative works used in 2021, even though version 2.1.8 is from 2003
Recent GoAhead software remains unaffected

Technical Details of CVE-2021-41615

Understanding the specifics of the vulnerability

Vulnerability Description

Websda.c in GoAhead WebServer 2.1.8 lacks sufficient entropy due to nonce calculation based on a hardcoded value
Contravenes HTTP Digest Access Authentication security guidelines

Affected Systems and Versions

GoAhead WebServer 2.1.8
Derivative works using the vulnerable websda.c code

Exploitation Mechanism

Nonce calculation dependency on a non-random value can be exploited to undermine authentication security

Mitigation and Prevention

Steps to address the vulnerability

Immediate Steps to Take

Implement secure nonce generation practices
Regularly monitor for unauthorized access
Update to the latest version of GoAhead WebServer or patch vulnerable code

Long-Term Security Practices

Conduct regular security audits and assessments
Educate users on secure authentication practices
Stay informed about security best practices and updates

Patching and Updates

Apply patches provided by the software vendor
Keep GoAhead WebServer and related software up to date to address security vulnerabilities