CVE-2016-0418 in Solaris
Summary
by MITRE
Unspecified vulnerability in Oracle Sun Solaris 11 allows local users to affect confidentiality, integrity, and availability via unknown vectors related to Solaris Kernel Zones, a different vulnerability than CVE-2016-0414.
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Analysis
by VulDB Data Team • 07/05/2022
The vulnerability identified as CVE-2016-0418 represents a significant security flaw within Oracle Sun Solaris 11 operating system that affects the Solaris Kernel Zones component. This unspecified vulnerability operates at the kernel level and provides local attackers with the ability to compromise multiple security properties simultaneously, including confidentiality, integrity, and availability. The vulnerability specifically relates to the kernel zones implementation, which serves as a fundamental component for containerization and virtualization within the Solaris operating system environment. Unlike CVE-2016-0414 which addresses a different aspect of the same system, CVE-2016-0418 focuses on the underlying kernel zone mechanisms that govern how isolated execution environments operate within the Solaris kernel space.
The technical nature of this vulnerability stems from improper handling of kernel zone resources and potentially insufficient validation mechanisms within the kernel zone subsystem. Attackers with local access can exploit this weakness to manipulate the kernel zone environment in ways that compromise system security. The unspecified vectors suggest that the vulnerability may involve multiple attack paths or could be related to improper privilege handling, resource management issues, or memory corruption within the kernel zone implementation. This type of vulnerability is particularly dangerous because it operates at the core kernel level where local users can potentially escalate their privileges or manipulate system resources that should be protected from local access.
The operational impact of CVE-2016-0418 extends beyond simple data compromise as it affects all three fundamental security properties. Confidentiality can be breached when attackers gain access to sensitive kernel information or data that should remain protected within the zone isolation boundaries. Integrity is compromised when attackers can modify system resources, kernel structures, or zone configurations that maintain system consistency. Availability suffers when attackers can potentially crash system processes or cause denial of service conditions within the kernel zone environment. The vulnerability essentially undermines the isolation guarantees that kernel zones are designed to provide, allowing local attackers to potentially escape zone boundaries and affect the entire system.
From a cybersecurity perspective, this vulnerability aligns with CWE-264, which addresses permissions, privileges, and access control issues within operating system components. The attack surface is particularly concerning because it affects the kernel zone functionality that many organizations rely upon for system isolation and security segmentation. Organizations using Solaris 11 with kernel zones enabled face significant risk from this vulnerability, as local attackers could potentially use it to gain unauthorized access to sensitive system resources or disrupt critical services. The vulnerability also maps to ATT&CK technique T1068, which involves local privilege escalation and exploitation of system vulnerabilities to gain elevated privileges.
Mitigation strategies for CVE-2016-0418 require immediate patching from Oracle, as the vulnerability exists within the core kernel components of Solaris 11. System administrators should prioritize applying the official Oracle security patches and updates that address the kernel zone implementation issues. Additionally, organizations should implement network segmentation and access controls to limit local user access where possible, though this does not fully address the kernel-level nature of the vulnerability. Monitoring for unusual system behavior or unauthorized zone access attempts should be implemented as part of defensive measures. The vulnerability highlights the importance of maintaining up-to-date security patches and the critical need for organizations to regularly assess their kernel-level security posture, particularly in environments that rely heavily on containerization and virtualization technologies.