CVE-2015-2616 in Solaris
Summary
by MITRE
Unspecified vulnerability in Oracle Sun Solaris 3.3 and 4.2 allows local users to affect availability via unknown vectors related to DevFS.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 06/02/2022
The vulnerability identified as CVE-2015-2616 represents a significant security flaw within Oracle Sun Solaris operating systems, specifically affecting versions 3.3 and 4.2. This issue resides within the DevFS (Device File System) component, which serves as a critical interface for device management and access control within the Solaris environment. The unspecified nature of the vulnerability vectors indicates that the exact technical mechanisms enabling the availability impact remain undisclosed, though the classification suggests a potential denial of service condition that could compromise system stability and operational continuity.
The technical flaw within DevFS manifests as a weakness that local attackers can exploit to disrupt system availability, potentially causing system crashes, device unresponsiveness, or complete service interruption. This type of vulnerability falls under the broader category of availability attacks that target core system components, aligning with CWE-119 which addresses memory corruption vulnerabilities that can lead to system instability. The DevFS subsystem's role in managing device nodes and facilitating device access makes it a particularly attractive target for attackers seeking to disrupt system operations, as compromising this component can cascade into broader system failures.
From an operational impact perspective, this vulnerability poses substantial risk to Solaris environments that rely heavily on device management and system stability. Local users with access to the system can potentially leverage this weakness to cause service disruption, leading to unauthorized denial of service conditions that may affect critical applications and system functionality. The attack vector being local means that the threat is not externally accessible, but the potential impact remains severe given that any user with local access could exploit this condition to compromise system availability, making it particularly concerning for multi-user systems where privilege escalation is possible.
The security implications extend beyond immediate availability concerns as this vulnerability represents a potential pathway for more sophisticated attacks that could lead to privilege escalation or further system compromise. The DevFS component's integration with the kernel's device management subsystem means that exploitation could potentially allow attackers to manipulate device access controls or corrupt device driver operations. This vulnerability aligns with ATT&CK technique T1499 which covers network denial of service attacks, though in this case the attack is local rather than network-based. Organizations running affected Solaris versions should implement immediate patching strategies to address this vulnerability, as the unspecified nature of the attack vectors suggests that the threat landscape may be broader than initially understood.
Mitigation strategies for CVE-2015-2616 should prioritize immediate system patching from Oracle, as well as implementing additional security controls such as monitoring for unusual device access patterns and restricting local user privileges where possible. System administrators should also consider implementing network segmentation to limit the potential impact of local privilege escalation attacks and maintain comprehensive audit logs to detect exploitation attempts. The vulnerability's classification as a local availability threat suggests that traditional network-based security measures may not be sufficient, requiring a more comprehensive approach to privilege management and system hardening that addresses both the specific DevFS weakness and broader system security posture.