CVE-2019-9488 in Security Manager
Summary
by MITRE
Trend Micro Deep Security Manager (10.x, 11.x) and Vulnerability Protection (2.0) are vulnerable to a XML External Entity Attack. However, for the attack to be possible, the attacker must have root/admin access to a protected host which is authorized to communicate with the Deep Security Manager (DSM).
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Analysis
by VulDB Data Team • 08/21/2020
The vulnerability identified as CVE-2019-9488 represents a critical XML External Entity (XXE) flaw affecting Trend Micro Deep Security Manager versions 10.x and 11.x, along with Vulnerability Protection version 2.0. This weakness falls under the CWE-611 category of XML External Entity Processing, where the system improperly handles external entity references in XML data structures. The vulnerability stems from insufficient input validation and sanitization of XML content processed by the Deep Security Manager, creating an attack surface that could potentially be exploited to gain unauthorized access to sensitive system resources and data.
The exploitation of this XXE vulnerability requires a specific prerequisite condition where attackers must already possess root or administrative access to a host system that is authorized to communicate with the Deep Security Manager. This initial compromise represents a critical attack vector that aligns with the ATT&CK technique T1078 for Valid Accounts and T1566 for Phishing with Malicious Attachments or Links. The attacker's ability to leverage this vulnerability is significantly constrained by the requirement for pre-existing elevated privileges on a managed host, which typically indicates a successful initial compromise through other means such as credential theft, privilege escalation, or exploitation of other system vulnerabilities.
The operational impact of this vulnerability extends beyond simple data exfiltration or system compromise. The Deep Security Manager serves as a central security management platform that orchestrates security policies, threat detection, and response mechanisms across multiple protected endpoints. An attacker who successfully exploits this XXE vulnerability could potentially manipulate security policies, access sensitive configuration data, or gain unauthorized visibility into network security posture. The implications are particularly severe given that the Deep Security Manager acts as a security control itself, making this vulnerability a potential attack path that could undermine the very security infrastructure it is designed to protect. This creates a dangerous scenario where an attacker could subvert the security controls they are meant to enforce, potentially leading to widespread compromise of protected systems and data.
Mitigation strategies for CVE-2019-9488 should focus on both immediate remediation and long-term architectural improvements. The primary solution involves applying the vendor-provided patches and updates that address the XML processing flaws in the affected Trend Micro products. Organizations should also implement network segmentation and access controls to limit the communication paths between managed hosts and the Deep Security Manager, reducing the potential attack surface. Additional defensive measures include implementing strict input validation for all XML data entering the system, disabling unnecessary XML features such as external entity resolution, and deploying network monitoring solutions to detect anomalous communication patterns. The implementation of these controls should align with the MITRE ATT&CK framework's defensive strategies, particularly focusing on T1562 for Impair Defenses and T1098 for Account Manipulation. Organizations should also conduct regular security assessments and penetration testing to verify the effectiveness of their mitigations and identify potential new attack vectors that may emerge from the exploitation of this and similar vulnerabilities.