CVE-2024-43416 in GLPI
Summary
by MITRE • 11/18/2024
GLPI is a free asset and IT management software package. Starting in version 0.80 and prior to version 10.0.17, an unauthenticated user can use an application endpoint to check if an email address corresponds to a valid GLPI user. Version 10.0.17 fixes the issue.
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Analysis
by VulDB Data Team • 11/20/2024
The vulnerability identified as CVE-2024-43416 affects GLPI, a widely-used open-source asset and IT management software package that organizations rely on for maintaining their technology infrastructure. This security flaw exists in versions starting from 0.80 through 10.0.16, representing a significant concern for organizations that depend on GLPI for their IT asset management and service desk operations. The vulnerability stems from an application endpoint that lacks proper authentication requirements, allowing any unauthenticated user to query the system for email address validation. This represents a critical information disclosure vulnerability that directly violates fundamental security principles of access control and authentication.
The technical implementation of this vulnerability involves an endpoint within the GLPI application that accepts email addresses as input parameters and returns responses indicating whether those addresses correspond to valid user accounts within the system. This behavior creates a user enumeration attack vector where malicious actors can systematically test email addresses against the application to discover valid user accounts. The flaw operates at the application layer and does not require any prior authentication credentials, making it particularly dangerous as it can be exploited by anyone with access to the application's network interface. This vulnerability maps directly to CWE-200, which addresses information exposure, and CWE-305, which covers authentication bypass mechanisms.
The operational impact of this vulnerability extends beyond simple information disclosure, as it enables attackers to conduct reconnaissance activities that can lead to more sophisticated attacks. When an attacker successfully enumerates valid email addresses, they gain valuable intelligence that can be used for targeted phishing campaigns, social engineering attacks, or brute force attempts against user accounts. The vulnerability essentially provides a map of valid users within the organization's IT infrastructure, which can serve as a foundation for further compromise. From an attacker's perspective, this information is particularly valuable as it allows them to focus their efforts on specific targets rather than conducting broad, ineffective attacks. The vulnerability also aligns with ATT&CK technique T1087.001, which involves account discovery through enumeration of valid user accounts.
Organizations utilizing GLPI should prioritize immediate remediation by upgrading to version 10.0.17 or later, which contains the necessary patches to address this vulnerability. The fix implemented in version 10.0.17 likely involves enforcing proper authentication requirements on the email validation endpoint or implementing rate limiting to prevent systematic enumeration attempts. Additionally, organizations should implement network-level controls such as firewall rules to restrict access to the GLPI application to authorized networks only, and consider implementing additional monitoring for unusual patterns of email address validation requests. Security teams should also review their existing user enumeration prevention measures and ensure that similar vulnerabilities do not exist in other endpoints within the application or related systems. The vulnerability demonstrates the importance of proper input validation and authentication controls in web applications, particularly those handling user account information.