CVE-2016-5501 in VM VirtualBox
Summary
by MITRE
Unspecified vulnerability in the Oracle VM VirtualBox component before 5.0.28 and 5.1.x before 5.1.8 in Oracle Virtualization allows local users to affect confidentiality, integrity, and availability via vectors related to Core, a different vulnerability than CVE-2016-5538.
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Analysis
by VulDB Data Team • 09/27/2022
The vulnerability identified as CVE-2016-5501 affects Oracle VM VirtualBox versions prior to 5.0.28 and 5.1.x versions before 5.1.8, representing a critical security flaw within the virtualization platform's core components. This unspecified vulnerability resides within the VirtualBox Core functionality and demonstrates the inherent risks associated with complex virtualization environments where multiple layers of software interact to create virtual machine instances. The vulnerability's classification as affecting confidentiality, integrity, and availability indicates a severe impact across all three fundamental principles of information security, suggesting that attackers could potentially compromise the entire virtualization infrastructure. The fact that this represents a different vulnerability than CVE-2016-5538 highlights the complexity of virtualization security and the need for comprehensive vulnerability management across all components of virtualization platforms.
The technical nature of this vulnerability lies within the Core component of Oracle VM VirtualBox, which serves as the foundational layer responsible for managing virtual machine execution, memory allocation, and hardware abstraction. This core functionality is critical to the proper operation of virtual machines and handles sensitive data processing operations that could be exploited by local attackers. The unspecified nature of the vulnerability description suggests that the exact technical mechanism remains undisclosed, but the classification as a local privilege escalation issue indicates that attackers with access to the virtualization host system could leverage this flaw to gain elevated privileges or manipulate core system functions. The vulnerability's presence in both the 5.0 and 5.1 release branches demonstrates the persistence of the flaw across multiple versions, indicating that the underlying code issue was not properly addressed in the initial patches or that the vulnerability was introduced in a fundamental architectural component.
From an operational perspective, this vulnerability presents significant risks to organizations utilizing Oracle VM VirtualBox for virtualization purposes, as local attackers could potentially exploit this flaw to compromise the entire virtualization environment. The impact on confidentiality means that sensitive data processed within virtual machines could be accessed by unauthorized users, while the integrity compromise could allow attackers to modify virtual machine configurations or host system data. The availability impact suggests that attackers might be able to disrupt virtualization services or cause system instability, potentially leading to denial of service conditions that could affect multiple virtual machines running on the same host. The local nature of the attack vector means that exploitation requires access to the host system, but once achieved, the impact could extend beyond individual virtual machines to affect the entire virtualization infrastructure. This vulnerability aligns with CWE-20, which addresses "Improper Input Validation," and represents a classic case of insufficient privilege checks or inadequate access controls within core system components.
Organizations should implement immediate mitigation strategies including applying the vendor-provided patches for Oracle VM VirtualBox versions 5.0.28 and 5.1.8, respectively, while also implementing additional security controls such as network segmentation, privilege separation, and monitoring for unusual system behavior. The vulnerability demonstrates the importance of maintaining up-to-date virtualization software and following security best practices, including regular vulnerability assessments and security audits of virtualization environments. From an ATT&CK framework perspective, this vulnerability could map to techniques such as privilege escalation and defense evasion, as attackers might use the flaw to gain elevated privileges and then move laterally within the virtualization infrastructure. Organizations should also consider implementing additional monitoring for suspicious activities that might indicate exploitation attempts, particularly focusing on processes that interact with virtualization core components and changes to virtual machine configurations or host system files. The vulnerability serves as a reminder of the critical importance of vulnerability management in virtualized environments and the need for comprehensive security strategies that address both guest operating systems and host system security.