CVE-2015-4856 in VM VirtualBox
Summary
by MITRE
Unspecified vulnerability in the Oracle VM VirtualBox component in Oracle Virtualization VirtualBox before 4.0.30, 4.1.38, 4.2.30, 4.3.26, and 5.0.0 allows local users to affect availability via unknown vectors related to Core.
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Analysis
by VulDB Data Team • 11/24/2024
The vulnerability identified as CVE-2015-4856 represents a critical availability issue within Oracle VM VirtualBox virtualization software, specifically affecting versions prior to 4.0.30, 4.1.38, 4.2.30, 4.3.26, and 5.0.0. This flaw resides within the Core component of the virtualization platform, which serves as the fundamental engine responsible for managing virtual machine operations and system resources. The unspecified nature of the vulnerability vectors indicates that the exact technical mechanism remains undisclosed, though the impact is clearly focused on compromising system availability rather than direct privilege escalation or data compromise. The vulnerability affects local users, meaning an attacker must already have access to the system where VirtualBox is installed to exploit this weakness, which significantly limits the attack surface but does not eliminate the risk.
The Core component in VirtualBox is responsible for critical system operations including memory management, processor scheduling, and hypervisor functions that maintain the integrity of virtual machine environments. When a vulnerability exists within this foundational layer, the potential impact extends across all virtual machines running on the affected system, potentially leading to complete system crashes or service unavailability. This type of vulnerability aligns with CWE-119, which addresses weaknesses in memory management and buffer overflows that can result in system instability. The vulnerability's classification as an availability issue suggests it likely involves resource exhaustion, memory corruption, or process termination that prevents normal system operation rather than enabling unauthorized access to system resources.
From an operational perspective, this vulnerability poses significant risk to organizations relying on VirtualBox for development, testing, or production environments where system uptime is critical. Local attackers could potentially cause denial of service conditions that affect multiple virtual machines simultaneously, leading to business disruption and loss of productivity. The impact extends beyond simple system crashes to include potential data loss or corruption if virtual machine states become compromised during the availability disruption. Organizations utilizing VirtualBox for enterprise applications or cloud infrastructure would face substantial operational risks, as this vulnerability could be exploited to disrupt critical services or applications running within virtualized environments.
Security professionals should prioritize patching affected systems to address CVE-2015-4856, as the vulnerability represents a significant risk to system availability in virtualized environments. The recommended mitigation strategy involves updating to the patched versions of VirtualBox as specified in the advisory, which typically include fixes for memory management and core component stability issues. Additionally, implementing network segmentation and access controls to limit local user access to virtualization hosts can help reduce the attack surface. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving privilege escalation and denial of service, though the local nature of the attack means it falls more specifically within the domain of local exploitation rather than network-based attacks. Organizations should also consider implementing monitoring solutions to detect abnormal system behavior that might indicate exploitation attempts or system instability related to this vulnerability.