CVE-2019-20479 : Exploit Details and Defense Strategies
Discover the impact of CVE-2019-20479, a vulnerability in mod_auth_openidc allowing open redirection in specific URL structures. Learn how to mitigate and prevent exploitation.
A vulnerability has been discovered in mod_auth_openidc prior to version 2.4.1, allowing open redirection when encountering specific URLs.
Understanding CVE-2019-20479
What is CVE-2019-20479?
CVE-2019-20479 is a vulnerability found in mod_auth_openidc before version 2.4.1, enabling open redirection with certain URL structures.
The Impact of CVE-2019-20479
This vulnerability could be exploited to redirect users to malicious websites, potentially leading to phishing attacks or the installation of malware.
Technical Details of CVE-2019-20479
Vulnerability Description
The flaw in mod_auth_openidc allows open redirection when URLs start with both a forward slash and a backslash.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Affected Version: n/a
Exploitation Mechanism
The vulnerability can be exploited by crafting URLs with specific combinations of forward and backslashes to trigger the open redirection flaw.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade to mod_auth_openidc version 2.4.1 or newer to mitigate the vulnerability.
- Implement URL validation mechanisms to prevent open redirection attacks.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Conduct security audits and penetration testing to identify and address potential security weaknesses.
Patching and Updates
Stay informed about security advisories and updates from the mod_auth_openidc project to apply patches promptly.