CVE-2015-7912 in AggreGate
Summary
by MITRE
The Ice Faces servlet in ag_server_service.exe in the AggreGate Server Service in Tibbo AggreGate before 5.30.06 allows remote attackers to upload and execute arbitrary Java code via a crafted XML document.
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Analysis
by VulDB Data Team • 06/19/2018
The vulnerability identified as CVE-2015-7912 represents a critical remote code execution flaw within the Tibbo AggreGate Server Service software. This issue specifically affects the Ice Faces servlet component that operates within the ag_server_service.exe process, creating a pathway for malicious actors to gain unauthorized control over affected systems. The vulnerability exists in versions prior to 5.30.06 of the AggreGate Server Service, making a substantial portion of deployed installations potentially susceptible to exploitation. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied XML data, allowing attackers to craft malicious documents that bypass security controls.
The technical implementation of this vulnerability involves the exploitation of improper XML parsing and object deserialization mechanisms within the Ice Faces servlet. When a crafted XML document is submitted to the vulnerable service, the system processes the input without adequate validation, leading to the execution of arbitrary Java code within the context of the ag_server_service.exe process. This represents a classic server-side request forgery and code injection vulnerability that operates at the application layer, leveraging the inherent trust relationships within the system to execute malicious payloads. The vulnerability falls under CWE-20, which specifically addresses improper input validation, and demonstrates how insufficient sanitization of user data can lead to complete system compromise.
From an operational perspective, the impact of CVE-2015-7912 extends far beyond simple data theft or service disruption. Attackers who successfully exploit this vulnerability can establish persistent backdoors, escalate privileges, and potentially move laterally within network environments where the AggreGate Server Service operates. The remote nature of the attack means that threat actors can exploit this flaw from anywhere on the internet without requiring physical access or local network presence. This vulnerability directly maps to several MITRE ATT&CK techniques including T1190 for exploitation of remote services and T1059 for command and scripting interpreter usage, making it a significant concern for industrial control systems and enterprise environments that utilize Tibbo AggreGate platforms.
The mitigation strategy for CVE-2015-7912 requires immediate implementation of the vendor-provided patch version 5.30.06 or later, which addresses the underlying XML parsing and input validation issues. Organizations should also implement network segmentation to limit access to the AggreGate Server Service, deploy intrusion detection systems to monitor for suspicious XML traffic patterns, and conduct thorough network scans to identify all affected instances. Additionally, implementing web application firewalls with custom rules to filter malicious XML content and disabling unnecessary XML processing capabilities within the service can provide additional defense-in-depth measures. Security teams should also review and update their incident response procedures to ensure rapid detection and remediation of similar vulnerabilities, as this type of flaw represents a common attack vector in industrial IoT environments where legacy systems often lack proper security updates.