CVE-2020-28575 in ServerProtect for Linux
Summary
by MITRE • 12/02/2020
A heap-based buffer overflow privilege escalation vulnerability in Trend Micro ServerProtect for Linux 3.0 may allow an attacker to escalate privileges on affected installations. An attacker must first obtain the ability to execute high-privileged code on the target in order to exploit this vulnerability.
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Analysis
by VulDB Data Team • 12/11/2020
The heap-based buffer overflow vulnerability identified as CVE-2020-28575 affects Trend Micro ServerProtect for Linux version 3.0 and represents a critical privilege escalation flaw that could enable attackers to gain elevated system privileges. This vulnerability resides within the memory management mechanisms of the security software, specifically targeting heap allocation structures that handle data processing operations. The flaw manifests when the application processes malformed input through its buffer handling routines, creating conditions where attacker-controlled data can overwrite adjacent memory regions beyond the intended buffer boundaries. The vulnerability is classified under CWE-121 as a heap-based buffer overflow, which occurs when a program writes data beyond the allocated heap memory boundaries, potentially corrupting program execution flow and data structures.
The technical exploitation of this vulnerability requires an attacker to first establish a foothold with high-privileged code execution capabilities on the target system, as the vulnerability cannot be triggered remotely without prior access. This prerequisite aligns with ATT&CK technique T1059.001 for command and script interpreter execution, indicating that attackers would need to leverage existing access to execute malicious payloads that can trigger the buffer overflow condition. The heap corruption occurs during processing of specific data inputs that are improperly validated, allowing attackers to manipulate heap metadata and potentially overwrite function pointers or return addresses within the program's execution context. The vulnerability's exploitation pathway demonstrates characteristics of privilege escalation through memory corruption, where corrupted heap memory can be leveraged to execute arbitrary code with elevated privileges, typically matching ATT&CK tactic T1068 for privilege escalation.
The operational impact of CVE-2020-28575 extends beyond simple privilege escalation as it represents a fundamental flaw in the application's memory management that could enable complete system compromise when successfully exploited. Organizations running Trend Micro ServerProtect for Linux 3.0 face significant risk of unauthorized access to sensitive system resources, as successful exploitation could provide attackers with root-level privileges to modify system configurations, install malware, or exfiltrate confidential data. The vulnerability's presence in a security application creates a particularly concerning scenario where the system's protective mechanisms are compromised, potentially allowing attackers to bypass other security controls. Network administrators and security teams must consider the implications of this vulnerability as it could be exploited to maintain persistent access to systems while evading traditional security monitoring mechanisms that rely on the integrity of security software components.
Mitigation strategies for CVE-2020-28575 should prioritize immediate patching of affected Trend Micro ServerProtect installations to address the heap-based buffer overflow condition. Organizations should implement network segmentation and access controls to limit potential exploitation vectors and reduce the attack surface for privilege escalation attempts. Security monitoring should focus on detecting anomalous execution patterns and memory corruption indicators that may signal exploitation attempts, leveraging both traditional signature-based detection and behavioral analysis approaches. System hardening measures including disabling unnecessary services, implementing proper privilege separation, and conducting regular security audits can reduce the likelihood of successful exploitation. The vulnerability highlights the importance of maintaining current security software versions and implementing robust patch management processes to prevent exploitation of known memory corruption vulnerabilities. Additionally, organizations should consider implementing application whitelisting and runtime protection mechanisms to prevent execution of unauthorized code that could trigger the buffer overflow condition, aligning with defense-in-depth strategies recommended by cybersecurity frameworks such as NIST SP 800-53.