CVE-2022-24129 in OIDC OP Plugin
Summary
by MITRE • 02/04/2022
The OIDC OP plugin before 3.0.4 for Shibboleth Identity Provider allows server-side request forgery (SSRF) due to insufficient restriction of the request_uri parameter. This allows attackers to interact with arbitrary third-party HTTP services.
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Analysis
by VulDB Data Team • 02/07/2022
The CVE-2022-24129 vulnerability represents a critical server-side request forgery flaw in the OIDC OP plugin for Shibboleth Identity Provider versions prior to 3.0.4. This vulnerability stems from inadequate validation and restriction of the request_uri parameter, which creates an exploitable condition where malicious actors can manipulate HTTP requests to target arbitrary third-party services. The issue specifically affects the OpenID Connect (OIDC) provider functionality within the Shibboleth Identity Provider ecosystem, which is widely deployed in enterprise and academic environments for identity management and single sign-on operations.
The technical implementation of this vulnerability occurs when the OIDC OP plugin processes the request_uri parameter without proper sanitization or validation of the URI scheme and destination. Attackers can craft malicious requests that bypass normal access controls and direct the identity provider to make HTTP requests to internal or external services that should otherwise be restricted. This flaw enables adversaries to perform reconnaissance, data exfiltration, or even exploit other services that may be accessible from the identity provider server. The vulnerability operates at the application layer and can be exploited through crafted HTTP requests that manipulate the request_uri parameter to point to targeted endpoints, potentially allowing access to internal systems that are not directly exposed to the internet.
The operational impact of CVE-2022-24129 extends beyond simple data exposure, as it can enable attackers to perform lateral movement within networks where the Shibboleth Identity Provider operates. Organizations using affected versions face significant risk of unauthorized access to internal services, as the vulnerability allows for arbitrary HTTP requests to be made from the identity provider server. This represents a particular concern for environments where the identity provider server has access to sensitive internal resources or where it operates in a DMZ configuration. The vulnerability can be leveraged for information gathering, service discovery, and potentially more sophisticated attacks that exploit other vulnerabilities in systems accessible from the identity provider server.
Security practitioners should prioritize immediate remediation of this vulnerability by upgrading to Shibboleth Identity Provider version 3.0.4 or later, which includes proper input validation and restriction of the request_uri parameter. Additional mitigations include implementing network-level restrictions to prevent the identity provider server from accessing sensitive internal services, deploying web application firewalls to monitor and block suspicious requests, and conducting comprehensive security assessments of the identity provider configuration. This vulnerability aligns with CWE-918, which describes server-side request forgery vulnerabilities, and maps to ATT&CK technique T1190 for exploiting weaknesses in remote services. Organizations should also implement monitoring and logging of HTTP requests to detect potential exploitation attempts and establish proper access controls to limit the potential impact of successful attacks. The vulnerability underscores the importance of proper input validation and the principle of least privilege in identity management systems, particularly those handling sensitive authentication flows.