CVE-2022-23527 : Vulnerability Insights and Analysis
Learn about CVE-2022-23527 impacting mod_auth_openidc Apache module. Find details on the open redirect vulnerability and steps to mitigate the risk.
This article discusses the CVE-2022-23527 vulnerability, which involves an open redirect in oidc_validate_redirect_url() function in mod_auth_openidc Apache module.
Understanding CVE-2022-23527
CVE-2022-23527 is a vulnerability in the mod_auth_openidc Apache module that allows for open redirects when a logout parameter is provided to the redirect URI.
What is CVE-2022-23527?
CVE-2022-23527 is a vulnerability in mod_auth_openidc versions prior to 2.4.12.2 that can lead to open redirects due to improper validation of URLs starting with /\t.
The Impact of CVE-2022-23527
The vulnerability can be exploited by attackers to redirect users to malicious sites, leading to phishing attacks and potential data breaches.
Technical Details of CVE-2022-23527
The vulnerability arises from a lack of proper URL validation in the oidc_validate_redirect_url() function, allowing for unauthorized redirects.
Vulnerability Description
mod_auth_openidc versions prior to 2.4.12.2 are vulnerable to open redirects when providing a logout parameter, enabling attackers to redirect users to untrusted sites.
Affected Systems and Versions
The vulnerability affects mod_auth_openidc versions earlier than 2.4.12.2, specifically those below version 2.4.12.2.
Exploitation Mechanism
Attackers can exploit the vulnerability by providing a malicious logout parameter to the redirect URI, triggering the open redirect in oidc_validate_redirect_url().
Mitigation and Prevention
To mitigate the CVE-2022-23527 vulnerability, users are advised to update to mod_auth_openidc version 2.4.12.2 or later.
Immediate Steps to Take
Users should update mod_auth_openidc to version 2.4.12.2 to patch the vulnerability and prevent open redirects.
Long-Term Security Practices
Implement regular security updates and best practices to enhance the overall security posture of Apache servers and modules.
Patching and Updates
Regularly monitor for security advisories and apply patches promptly to protect against known vulnerabilities.