CVE-2024-36108 in casgate
Summary
by MITRE • 05/31/2024
casgate is an Open Source Identity and Access Management system. In affected versions `casgate` allows remote unauthenticated attacker to obtain sensitive information via GET request to an API endpoint. This issue has been addressed in PR #201 which is pending merge. An attacker could use `id` parameter of GET requests with value `anonymous/ anonymous` to bypass authorization on certain API endpoints. Successful exploitation of the vulnerability could lead to account takeover, privilege escalation or provide attacker with credential to other services. Users are advised to upgrade. There are no known workarounds for this vulnerability.
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Analysis
by VulDB Data Team • 05/31/2024
The vulnerability identified as CVE-2024-36108 affects casgate, an open-source identity and access management system that provides authentication and authorization services for applications and systems. This security flaw represents a critical authorization bypass vulnerability that exposes sensitive information to remote attackers without requiring authentication credentials. The issue stems from improper validation of the id parameter in GET requests to specific API endpoints, creating a pathway for unauthorized access to protected resources. The vulnerability impacts the core security model of the system by allowing attackers to exploit a weakness in the authentication flow that should have prevented access to sensitive data.
The technical implementation of this vulnerability resides in how casgate processes the id parameter within GET requests to API endpoints. Attackers can craft malicious requests using the id parameter with the value "anonymous/anonymous" to bypass the authorization checks that should normally validate user credentials and permissions. This specific parameter value appears to be recognized by the system as a legitimate anonymous access identifier, but the implementation fails to properly enforce access controls when this parameter is used. The flaw essentially creates a backdoor pathway where any remote attacker can request sensitive information without proper authentication, effectively undermining the entire access control mechanism that the system is designed to enforce. This type of vulnerability is classified as a weakness in authorization mechanisms under CWE-285, which specifically addresses improper authorization issues in software systems.
The operational impact of this vulnerability extends far beyond simple information disclosure, presenting significant risks to system security and user privacy. Successful exploitation could enable attackers to perform account takeover operations by accessing user credentials and authentication tokens stored in the system's API responses. The vulnerability also provides potential for privilege escalation attacks, where an attacker might gain elevated access rights beyond what would normally be permitted for anonymous users. Additionally, the stolen credentials could be used to access other services that rely on the same authentication infrastructure, creating a cascading security risk throughout the organization's digital ecosystem. This vulnerability directly aligns with ATT&CK technique T1078.004, which covers valid accounts obtained through compromise, as the attacker essentially gains access to legitimate system accounts through the authorization bypass. The impact is particularly severe because the vulnerability affects API endpoints that should be protected from unauthorized access, potentially exposing sensitive user data, session information, and authentication tokens.
Organizations utilizing casgate systems should prioritize immediate remediation through the upgrade process as the vulnerability has been addressed in PR #201, though it remains pending merge at the time of this analysis. The recommended mitigation strategy involves upgrading to the patched version of the software that implements proper parameter validation and access control enforcement. Security administrators should also consider implementing network-level monitoring to detect suspicious API requests containing the specific malicious id parameter value. While no known workarounds exist for this particular vulnerability, organizations should conduct comprehensive security assessments to identify any potential exploitation attempts that may have already occurred. The vulnerability demonstrates the critical importance of proper input validation and authorization checking in authentication systems, particularly when dealing with parameterized API requests that handle sensitive information. System administrators must also review and audit existing access logs to identify any unauthorized access patterns that might indicate exploitation attempts before the patch was applied.