CVE-2020-1927 : Vulnerability Insights and Analysis

Apache HTTP Server redirect vulnerability due to mod_rewrite misconfiguration.

Understanding CVE-2020-1927

Apache HTTP Server versions 2.4.0 to 2.4.41 are susceptible to misconfigured redirects with mod_rewrite, leading to unexpected URL redirections.

What is CVE-2020-1927?

CWE-601: Open redirect vulnerability in mod_rewrite configurations
Attackers can exploit encoded newlines to redirect to unintended URLs

The Impact of CVE-2020-1927

Malicious actors can craft URLs to redirect users to malicious sites
Phishing attacks and unauthorized access to sensitive data could occur

Technical Details of CVE-2020-1927

Apache HTTP Server vulnerability details

Vulnerability Description

Redirect misconfiguration in mod_rewrite from versions 2.4.0 to 2.4.41
Encoded newlines can trick redirects to unintended URLs

Affected Systems and Versions

Product: Apache HTTP Server
Vendor: Apache
Affected Versions: 2.4.0 to 2.4.41

Exploitation Mechanism

Attackers exploit misconfigured mod_rewrite redirects
Crafting URLs with encoded newlines for malicious redirection

Mitigation and Prevention

Steps to address and prevent CVE-2020-1927

Immediate Steps to Take

Update Apache HTTP Server to versions beyond 2.4.41
Review and adjust mod_rewrite configurations to prevent misdirection
Monitor and analyze server logs for unusual redirection patterns

Long-Term Security Practices

Regularly monitor and update server software and configurations
Educate developers and administrators on secure web server practices
Implement URL validation mechanisms to detect and prevent malicious redirects

Patching and Updates

Check vendor advisories for patches and security updates
Apply patches promptly to secure the Apache HTTP Server