CVE-2019-6440 in AntiMalware
Summary
by MITRE
Zemana AntiMalware before 3.0.658 Beta mishandles update logic.
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Analysis
by VulDB Data Team • 05/01/2020
The vulnerability identified as CVE-2019-6440 affects Zemana AntiMalware versions prior to 3.0.658 Beta, representing a critical flaw in the software's update mechanism that could potentially allow attackers to execute arbitrary code or escalate privileges. This issue stems from improper handling of update logic within the anti-malware solution, creating a potential attack vector that adversaries could exploit to compromise systems running vulnerable versions of the software.
The technical flaw manifests in how the application processes software updates, specifically within the update validation and installation procedures. When Zemana AntiMalware attempts to download and install updates, the system fails to properly verify the integrity of update files or authenticate the update sources. This weakness creates opportunities for attackers to inject malicious code into the update process, potentially leading to privilege escalation or arbitrary code execution on affected systems. The vulnerability falls under the category of update authentication and validation failures, which are commonly categorized as CWE-502 in the Common Weakness Enumeration system. The flaw essentially allows for a form of supply chain attack where malicious updates can be delivered to vulnerable endpoints.
The operational impact of this vulnerability extends beyond simple exploitation, as it affects the fundamental security posture of systems relying on Zemana AntiMalware for protection. Organizations using vulnerable versions face potential compromise through update-based attacks, where attackers can leverage the legitimate update mechanism to deploy malware or backdoors. This creates a particularly dangerous scenario because the update process is typically trusted by users and security systems, making the attack vector more insidious. The vulnerability could enable attackers to bypass traditional security controls, as the malicious updates would appear to be legitimate software patches. From an adversary perspective, this represents a valuable attack primitive that could be used for persistent access or lateral movement within compromised networks, aligning with tactics described in the MITRE ATT&CK framework under software supply chain compromise techniques.
Mitigation strategies for CVE-2019-6440 primarily focus on immediate remediation through patching the affected software to version 3.0.658 Beta or later. System administrators should prioritize updating all instances of Zemana AntiMalware across their network infrastructure to eliminate the vulnerability. Additionally, organizations should implement network monitoring to detect unusual update traffic patterns or attempts to deliver unauthorized updates to endpoint systems. The vulnerability highlights the importance of secure update mechanisms and proper code signing practices, as outlined in industry standards for software security. Organizations should also consider implementing application whitelisting policies to restrict execution of unauthorized software updates, and establish robust verification procedures for all software distribution channels. Regular security assessments of endpoint protection solutions should include evaluation of update mechanisms to prevent similar vulnerabilities from being introduced in other security software components.