CVE-2011-3515 in Solaris
Summary
by MITRE
Unspecified vulnerability in the Oracle Solaris 10 and 11 Express allows local users to affect integrity and availability via unknown vectors related to Process File System (procfs).
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Analysis
by VulDB Data Team • 11/24/2021
The vulnerability identified as CVE-2011-3515 resides within Oracle Solaris operating systems versions 10 and 11 Express, specifically within the Process File System component known as procfs. This designation indicates a security weakness that affects the fundamental system integrity and availability aspects of the operating environment. The unspecified nature of the vulnerability vectors suggests that the exact technical mechanisms enabling exploitation remain undocumented in the public domain, though the impact spans both data integrity and system availability domains.
The Process File System in Solaris provides a virtual file system interface to kernel data structures and process information, allowing users and applications to access runtime information about processes and system resources through standard file operations. This design enables powerful debugging and monitoring capabilities but also introduces potential attack surfaces when proper access controls and validation mechanisms are insufficient. The vulnerability specifically targets the procfs implementation, which means that local attackers with system access can potentially manipulate or corrupt process-related information, leading to system instability and data integrity compromise.
From an operational perspective, this vulnerability represents a significant concern for system administrators and security professionals managing Solaris environments. Local users who gain access to system resources can exploit this weakness to potentially corrupt process information, manipulate system behavior, or cause system availability issues through process manipulation. The impact extends beyond simple data corruption to potentially enabling more sophisticated attacks that could escalate privileges or cause denial of service conditions. The vulnerability's location within the core system file system interface means that exploitation could affect critical system operations and potentially provide attackers with opportunities to establish persistent access or hide malicious activities.
The technical flaw likely involves insufficient validation or access control mechanisms within the procfs implementation, allowing local users to manipulate process-related data structures without proper authorization. This could manifest as improper handling of file operations within the procfs namespace, inadequate permission checking for process information access, or flawed validation of input parameters that affect process state management. Such weaknesses align with common software security issues related to improper access control and insufficient input validation, which are categorized under CWE-284 for improper access control and CWE-121 for stack-based buffer overflow conditions.
Mitigation strategies for this vulnerability should include immediate deployment of Oracle's security patches and updates specifically addressing the procfs implementation weaknesses. System administrators should implement comprehensive monitoring of procfs access patterns to detect anomalous behavior that might indicate exploitation attempts. The principle of least privilege should be enforced rigorously, limiting local user access to process information where possible and implementing additional access controls for sensitive system interfaces. Security hardening measures should focus on reducing the attack surface of procfs by disabling unnecessary functionality and implementing strict access controls for process-related operations.
Organizations maintaining Solaris systems should conduct thorough vulnerability assessments to identify systems running affected versions and prioritize patch deployment according to risk levels. The vulnerability's classification as affecting integrity and availability suggests that incident response procedures should include monitoring for process manipulation indicators and system stability issues. Compliance with security standards such as those outlined in the NIST Cybersecurity Framework and ISO 27001 should be maintained through proper vulnerability management and security control implementation. This vulnerability exemplifies the importance of maintaining up-to-date system patches and implementing robust security monitoring to prevent exploitation of core system components that are fundamental to operating system functionality.