CVE-2022-36663 in Oxauth
Summary
by MITRE • 09/07/2022
Gluu Oxauth before v4.4.1 allows attackers to execute blind SSRF (Server-Side Request Forgery) attacks via a crafted request_uri parameter.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/07/2022
The vulnerability CVE-2022-36663 represents a critical blind server-side request forgery flaw in Gluu Oxauth versions prior to v4.4.1. This vulnerability specifically targets the handling of the request_uri parameter, which is commonly used in OAuth 2.0 authorization flows to specify the redirect URI for authentication responses. The flaw allows remote attackers to manipulate this parameter in a way that can trigger unintended server-side requests to arbitrary destinations, making it a significant security risk for organizations relying on Gluu's identity management solutions.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the request_uri parameter processing logic. When an attacker crafts a malicious request_uri value containing external URLs or IP addresses, the system fails to properly validate or restrict these inputs before using them in server-side operations. This lack of proper validation creates a pathway for attackers to potentially access internal systems or services that would normally be protected by network segmentation. The blind nature of this SSRF vulnerability means that attackers cannot directly see the responses from the internal targets, but can still infer successful exploitation through timing variations or indirect indicators.
The operational impact of this vulnerability extends beyond simple data exfiltration or internal network reconnaissance. Organizations using affected Gluu Oxauth versions face potential exposure to lateral movement attacks where attackers could leverage the SSRF capability to probe internal services, potentially accessing sensitive databases, administrative interfaces, or other critical systems. This vulnerability directly aligns with CWE-918, which classifies server-side request forgery vulnerabilities, and maps to ATT&CK technique T1071.004 for application layer protocol manipulation. The risk is particularly elevated in environments where Gluu servers are deployed in cloud or hybrid architectures where internal services may not be adequately protected from external network access.
Mitigation strategies for CVE-2022-36663 primarily focus on immediate patching to version 4.4.1 or later, which contains the necessary input validation fixes. Organizations should also implement network-level restrictions to prevent outbound connections from the Gluu server to internal networks, particularly for ports commonly used by administrative services. Additional protective measures include implementing strict whitelisting of valid redirect URIs, configuring proper network segmentation, and deploying web application firewalls that can detect and block suspicious request_uri patterns. Security monitoring should be enhanced to detect unusual outbound network requests from the authentication server, and regular vulnerability assessments should be conducted to identify similar input validation weaknesses in other components of the identity infrastructure.