CVE-2018-6223 in Email Encryption Gateway
Summary
by MITRE
A missing authentication for appliance registration vulnerability in Trend Micro Email Encryption Gateway 5.5 could allow an attacker to manipulate the registration process of the product to reset configuration parameters.
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Analysis
by VulDB Data Team • 11/23/2024
The vulnerability identified as CVE-2018-6223 represents a critical authentication flaw within Trend Micro Email Encryption Gateway version 5.5 that directly impacts the appliance registration process. This weakness stems from insufficient validation mechanisms during the registration phase, creating an avenue for unauthorized manipulation of the system's configuration parameters. The vulnerability specifically affects the appliance's ability to verify legitimate registration requests, allowing malicious actors to exploit this gap in the authentication framework.
From a technical perspective, the flaw manifests as a failure to properly authenticate registration requests, enabling attackers to bypass the intended security controls that should validate the legitimacy of configuration changes. The missing authentication mechanism operates at the appliance level where registration processes are handled, allowing unauthorized individuals to submit registration requests that can modify critical system parameters. This vulnerability falls under the category of insufficient authentication as defined by CWE-287, which specifically addresses scenarios where authentication mechanisms are either missing or inadequately implemented.
The operational impact of CVE-2018-6223 extends beyond simple configuration manipulation, as it provides attackers with the capability to potentially compromise the entire email encryption infrastructure. An attacker who successfully exploits this vulnerability could reset configuration parameters to malicious values, potentially disabling encryption services, altering security policies, or redirecting encrypted email traffic through compromised channels. This type of attack directly aligns with tactics described in the MITRE ATT&CK framework under the T1078 technique for valid accounts and T1566 for credential harvesting, as the exploitation involves manipulating legitimate registration processes to gain unauthorized access to system controls.
The security implications of this vulnerability are particularly severe given that email encryption gateways serve as critical components in enterprise security infrastructures, protecting sensitive communications from interception and unauthorized access. When an attacker can manipulate registration processes, they essentially gain the ability to modify the fundamental security controls that protect email communications, potentially leading to data breaches, compliance violations, and significant operational disruption. The vulnerability's impact is amplified by the fact that it affects the core registration mechanism that should serve as a gatekeeper for system configuration changes, making it a prime target for attackers seeking to establish persistent access or cause operational damage.
Mitigation strategies for CVE-2018-6223 should focus on implementing robust authentication controls for all registration processes, including multi-factor authentication requirements and secure validation mechanisms for configuration changes. Organizations should immediately apply vendor-provided patches and updates to address the authentication gap, while also implementing network segmentation to limit access to the appliance registration interfaces. Additionally, security monitoring should be enhanced to detect unusual registration patterns or configuration changes that might indicate exploitation attempts, with continuous verification of system integrity to ensure that unauthorized modifications have not occurred.