CVE-2009-4191 in Solaris
Summary
by MITRE
Unspecified vulnerability in the kernel in Sun Solaris 10 and OpenSolaris 2009.06 on the x86-64 platform allows local users to gain privileges via unknown vectors, as demonstrated by the vd_sol_local module in VulnDisco Pack Professional 8.12. NOTE: as of 20091203, this disclosure has no actionable information. However, because the VulnDisco Pack author is a reliable researcher, the issue is being assigned a CVE identifier for tracking purposes.
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Analysis
by VulDB Data Team • 05/04/2019
This vulnerability represents a critical privilege escalation flaw within the Solaris kernel operating on x86-64 architectures. The unspecified nature of the vulnerability vector in Sun Solaris 10 and OpenSolaris 2009.06 systems creates significant challenges for security professionals attempting to assess risk and implement protective measures. The vulnerability specifically affects the kernel's privilege management mechanisms, allowing local attackers with minimal system access to elevate their privileges to root level. The disclosure was initially made through the VulnDisco Pack Professional 8.12, which included the vd_sol_local module as a proof-of-concept demonstrating the exploitability of this kernel-level weakness.
The technical exploitation of this vulnerability occurs at the kernel level where the security model fails to properly validate or restrict privilege escalation pathways. Local users who can execute code on the system gain access to kernel memory management functions that should be restricted to privileged operations only. This type of vulnerability typically stems from improper kernel memory management, race conditions, or flawed privilege checking mechanisms that allow unauthorized code execution with elevated privileges. The x86-64 platform architecture introduces additional complexity in memory addressing and privilege levels that can be exploited through carefully crafted kernel interactions. According to CWE classification, this vulnerability would fall under CWE-269: Improper Privilege Management, which encompasses issues where software fails to properly enforce access controls on privileged operations.
The operational impact of this vulnerability extends beyond simple privilege escalation, potentially enabling complete system compromise and persistent access for malicious actors. Once successfully exploited, attackers can gain root privileges and subsequently access all system resources, modify critical system files, establish backdoors, or exfiltrate sensitive data. The vulnerability affects systems running Solaris 10 and OpenSolaris 2009.06, which were widely deployed in enterprise environments, making the potential impact substantial. Organizations running these systems face significant risk of unauthorized system access and data breaches. The vulnerability's exploitation through the vd_sol_local module demonstrates that even seemingly minor kernel flaws can be weaponized to achieve complete system compromise, aligning with ATT&CK technique T1068: Exploitation for Privilege Escalation.
Mitigation strategies for this vulnerability require immediate patching of affected systems through official Sun Microsystems security updates. System administrators should prioritize applying the relevant kernel patches that address the privilege escalation flaw, as manual workarounds are typically insufficient for kernel-level vulnerabilities. Network segmentation and access control measures can provide additional defense-in-depth, limiting potential attack surfaces and preventing unauthorized local access to vulnerable systems. Monitoring for suspicious privilege escalation attempts and anomalous system behavior can help detect exploitation attempts before they succeed. Organizations should also conduct thorough vulnerability assessments to identify all systems running affected Solaris versions and ensure complete patch coverage. The vulnerability's classification as a local privilege escalation issue means that proper system hardening, including disabling unnecessary services and implementing strict user access controls, can significantly reduce the attack surface and potential exploitation success rates.