CVE-2019-1010247 in mod_auth_openidc
Summary
by MITRE
ZmartZone IAM mod_auth_openidc 2.3.10.1 and earlier is affected by: Cross Site Scripting (XSS). The impact is: Redirecting the user to a phishing page or interacting with the application on behalf of the user. The component is: File: src/mod_auth_openidc.c, Line: 3109. The fixed version is: 2.3.10.2.
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Analysis
by VulDB Data Team • 11/05/2023
The vulnerability identified as CVE-2019-1010247 affects ZmartZone IAM mod_auth_openidc version 2.3.10.1 and earlier, representing a critical cross site scripting flaw that compromises user security within authentication systems. This vulnerability exists within the core authentication module responsible for OpenID Connect integration, making it a significant threat to identity management infrastructure. The flaw is specifically located in the file src/mod_auth_openidc.c at line 3109, indicating a precise technical entry point where user input is not properly sanitized before being processed in the authentication flow. The vulnerability stems from insufficient validation of user-supplied data that flows through the authentication process, creating an exploitable condition where malicious actors can inject malicious scripts into the application's response.
The operational impact of this XSS vulnerability extends beyond simple script execution, creating a sophisticated attack vector that enables attackers to manipulate user sessions and redirect victims to malicious phishing pages. When exploited, this vulnerability allows adversaries to perform session hijacking, steal authentication tokens, and potentially gain unauthorized access to protected resources within the authenticated application environment. The attack surface is particularly dangerous because it targets the authentication layer itself, meaning that successful exploitation could compromise the entire identity management system. According to CWE classification, this represents a CWE-79: Cross-site Scripting vulnerability, which is categorized under the broader category of input validation flaws that permit malicious code injection into web applications.
The attack pattern aligns with ATT&CK technique T1566.002 for phishing and T1071.004 for application layer protocol manipulation, demonstrating how attackers can leverage this vulnerability to establish persistent access to user sessions. The redirection capability specifically enables credential theft through phishing attacks, where users are unknowingly redirected to attacker-controlled domains that mimic legitimate authentication portals. The vulnerability's location within the authentication module makes it particularly dangerous because it can be exploited during the login process, when users are most trusting of the application interface. Attackers can craft malicious URLs or manipulate session parameters that, when processed by the vulnerable code, execute malicious scripts in the context of authenticated users' browsers.
Mitigation strategies should focus on immediate patching to version 2.3.10.2, which contains the necessary code fixes to sanitize user input properly. Organizations should also implement additional defensive measures including input validation at multiple layers, content security policy enforcement, and regular security scanning of authentication components. The fix typically involves proper sanitization of user-supplied parameters before they are rendered in the application's response, preventing script injection attacks. Network administrators should monitor for exploitation attempts through web application firewalls and intrusion detection systems, particularly looking for patterns of malicious URL parameters or script tags in authentication request flows. Regular security audits of authentication modules and comprehensive testing of input handling procedures should become standard practice to prevent similar vulnerabilities from emerging in other components of the identity management infrastructure.