CVE-2022-41329 in FortiOS
Summary
by MITRE • 03/07/2023
An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in Fortinet FortiProxy version 7.2.0 through 7.2.1 and 7.0.0 through 7.0.7, FortiOS version 7.2.0 through 7.2.3 and 7.0.0 through 7.0.9 allows an unauthenticated attackers to obtain sensitive logging informations on the device via crafted HTTP GET requests.
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Analysis
by VulDB Data Team • 03/08/2023
The vulnerability CVE-2022-41329 represents a critical information disclosure flaw affecting Fortinet FortiProxy and FortiOS products, classified under CWE-200 which specifically addresses exposure of sensitive information to unauthorized actors. This vulnerability exists in multiple versions of Fortinet's security appliances, including FortiProxy versions 7.2.0 through 7.2.1 and 7.0.0 through 7.0.7, as well as FortiOS versions 7.2.0 through 7.2.3 and 7.0.0 through 7.0.9. The flaw allows unauthenticated attackers to access sensitive logging information by crafting specifically formatted HTTP GET requests, bypassing normal authentication mechanisms that should protect such confidential data.
The technical implementation of this vulnerability exploits weaknesses in the web interface handling of HTTP requests within Fortinet's security appliances. Attackers can construct malicious GET requests that trigger the system to return sensitive logging information without requiring any valid credentials or authentication. This type of information disclosure vulnerability falls under the broader category of insecure direct object reference issues where the application fails to properly validate or restrict access to internal logging mechanisms. The vulnerability demonstrates poor input validation and access control implementation, allowing attackers to directly access system internals that should remain protected from external inspection.
The operational impact of this vulnerability is severe as it provides attackers with access to detailed system logs that may contain sensitive information such as user credentials, session data, network traffic patterns, and system configuration details. This exposure can significantly aid attackers in planning further attacks, as logging information often contains valuable reconnaissance data including user activities, system vulnerabilities, and potential attack vectors. The unauthenticated nature of the exploit means that any external party can access this information without requiring credentials, making the attack surface extremely broad and potentially enabling automated exploitation at scale. Organizations using affected Fortinet appliances face increased risk of targeted attacks, credential compromise, and system compromise as attackers can gather intelligence to inform more sophisticated attacks.
Mitigation strategies for CVE-2022-41329 should prioritize immediate patching of affected systems to the latest Fortinet firmware versions that contain the necessary security fixes. Network segmentation and firewall rules should be implemented to restrict access to Fortinet appliances from untrusted networks, limiting the attack surface where this vulnerability could be exploited. Organizations should also implement monitoring and logging controls to detect unusual access patterns or attempts to access system logs. The vulnerability aligns with several ATT&CK techniques including T1083 (File and Directory Discovery) and T1567 (Exfiltration Over Web Service) as attackers can use this information to further their objectives. Regular security assessments and vulnerability scanning should be conducted to identify similar access control weaknesses in other network components, as this type of information disclosure vulnerability often indicates broader architectural security issues that may affect other systems within the organization's infrastructure.