CVE-2016-0495 in VM VirtualBox
Summary
by MITRE
Unspecified vulnerability in the Oracle VM VirtualBox component in Oracle Virtualization VirtualBox before 4.3.36 and 5.0.14 allows remote attackers to affect availability via unknown vectors related to Core.
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Analysis
by VulDB Data Team • 07/05/2022
The vulnerability identified as CVE-2016-0495 affects Oracle VM VirtualBox versions prior to 4.3.36 and 5.0.14, representing a critical availability threat within the virtualization infrastructure. This unspecified flaw exists within the Core component of VirtualBox, which serves as the fundamental engine responsible for managing virtual machine operations, hardware emulation, and system resource allocation. The vulnerability's classification as a remote attack vector indicates that adversaries can exploit this weakness without requiring physical access to the target system, potentially compromising virtualized environments across network boundaries. The Core component's role in managing essential virtualization functions makes this vulnerability particularly dangerous as it could undermine the fundamental integrity of virtual machine operations.
The technical nature of this vulnerability lies in its unspecified vector characteristics, suggesting a fundamental flaw in how VirtualBox processes certain inputs or manages system resources within its core architecture. This type of vulnerability typically stems from memory corruption issues, improper input validation, or race conditions that can be triggered through crafted malicious inputs or network communications. The fact that this affects multiple version lines indicates a persistent architectural weakness rather than a one-time coding error, potentially involving low-level memory management or system call handling within the virtualization layer. Such vulnerabilities often align with common weakness enumerations such as CWE-119, which deals with memory corruption issues, or CWE-362, which addresses race conditions that can lead to availability disruptions.
From an operational standpoint, this vulnerability presents significant risk to organizations relying on VirtualBox for their virtualization needs, as it could enable attackers to cause denial of service conditions that disrupt virtual machine availability. The impact extends beyond simple service interruption to potentially compromising entire virtualized infrastructures, especially in environments where multiple virtual machines share underlying physical resources. Attackers could exploit this weakness to crash virtual machines, prevent new virtual machine creation, or cause system instability that affects all running virtual environments. The remote nature of the attack vector increases the attack surface significantly, as organizations may have virtualization servers exposed to untrusted networks without proper segmentation or access controls.
Organizations should immediately implement mitigation strategies including mandatory patching of all affected VirtualBox installations to versions 4.3.36 or 5.0.14 and later, which contain the necessary security fixes for this vulnerability. Network segmentation and access controls should be enforced to limit exposure of VirtualBox servers to trusted networks only, while monitoring systems should be deployed to detect anomalous behavior patterns that might indicate exploitation attempts. The mitigation approach should align with standard security practices outlined in the MITRE ATT&CK framework, particularly focusing on defense in depth strategies that include network segmentation, access control enforcement, and continuous monitoring. Regular vulnerability assessments and penetration testing should be conducted to identify similar weaknesses in virtualization environments, while incident response procedures should be established to address potential exploitation attempts. System administrators should also consider implementing additional security controls such as virtual machine isolation, resource quotas, and automated backup mechanisms to ensure business continuity in case of successful exploitation attempts.