CVE-2009-3839 in OpenSolaris
Summary
by MITRE
Unspecified vulnerability in the Solaris Trusted Extensions Policy configuration in Sun Solaris 10, and OpenSolaris snv_37 through snv_125, might allow remote attackers to execute arbitrary code by leveraging access to the X server.
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Analysis
by VulDB Data Team • 02/10/2025
The vulnerability described in CVE-2009-3839 represents a critical security flaw within the Solaris Trusted Extensions Policy configuration system that affects multiple versions of Sun Solaris 10 and OpenSolaris releases. This issue resides in the fundamental security architecture of the operating system's Trusted Extensions framework, which is designed to provide mandatory access controls and multi-level security capabilities. The vulnerability specifically exploits a weakness in how the system handles X server access, creating a potential attack vector that could be leveraged by remote adversaries to execute arbitrary code on affected systems.
The technical flaw manifests through the improper handling of X server access permissions within the Trusted Extensions Policy configuration. When an attacker gains access to the X server, they can potentially bypass the security controls that are meant to enforce strict access policies between different security levels. This represents a direct violation of the principle of least privilege and could allow attackers to escalate their privileges from lower security levels to higher ones, potentially gaining access to sensitive information or system resources that should be restricted. The vulnerability's nature suggests it involves improper validation or sanitization of X server access requests, allowing malicious input to be interpreted as legitimate system commands.
The operational impact of this vulnerability is severe given that Trusted Extensions are typically deployed in environments where security is paramount, such as government agencies, financial institutions, and other organizations handling classified or sensitive information. Remote code execution capabilities could enable attackers to compromise entire systems without requiring physical access or local user credentials. The attack scenario involves an attacker who can access the X server environment and then exploit the policy configuration weakness to execute arbitrary code, potentially leading to complete system compromise, data exfiltration, or further lateral movement within the network. This vulnerability undermines the core security model of Solaris Trusted Extensions, which is specifically designed to prevent such unauthorized access patterns.
Mitigation strategies for this vulnerability should include immediate patching of affected systems with the latest security updates provided by Oracle, as well as implementing network segmentation to limit X server access to trusted networks only. Organizations should also consider disabling unnecessary X server services when not required and implementing strict access controls for X server connections. From a compliance perspective, this vulnerability aligns with CWE-284, which addresses improper access control in software systems, and could be exploited through techniques consistent with ATT&CK tactics such as privilege escalation and execution through legitimate system tools. Additionally, organizations should conduct thorough security audits of their Trusted Extensions configurations and implement monitoring solutions to detect unusual X server access patterns that might indicate exploitation attempts.