CVE-2008-4281 in ESXi
Summary
by MITRE
Directory traversal vulnerability in VMWare ESXi 3.5 before ESXe350-200810401-O-UG and ESX 3.5 before ESX350-200810201-UG allows administrators with the Datastore.FileManagement privilege to gain privileges via unknown vectors.
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Analysis
by VulDB Data Team • 08/21/2019
The directory traversal vulnerability identified as CVE-2008-4281 represents a critical security flaw in VMware ESXi 3.5 environments that undermines the integrity of datastore file management operations. This vulnerability specifically affects systems running ESXi 3.5 versions prior to ESXe350-200810401-O-UG and ESX 3.5 versions prior to ESX350-200810201-UG, creating a pathway for unauthorized privilege escalation through seemingly legitimate administrative functions. The flaw resides within the Datastore.FileManagement privilege mechanism, which is designed to allow authorized administrators to manage files within virtual machine datastores but fails to properly validate file paths during certain operations.
The technical implementation of this vulnerability stems from inadequate input validation and path traversal checks within VMware's datastore management components. When administrators perform file management operations, the system should validate that file paths remain within the designated datastore boundaries and prevent access to parent directories or system-level resources. However, the vulnerability allows malicious actors with the Datastore.FileManagement privilege to exploit this validation gap through unspecified vectors that manipulate file path resolution mechanisms. This weakness aligns with CWE-22, which classifies directory traversal vulnerabilities as weaknesses that occur when applications allow access to resources outside of their intended scope through manipulated file paths.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and data exposure. An attacker with the Datastore.FileManagement privilege can leverage this weakness to access sensitive system files, configuration data, or other administrative resources that should remain isolated from normal datastore operations. The vulnerability creates a persistent threat vector that can be exploited across multiple virtualized environments, particularly in enterprise settings where ESXi 3.5 systems are deployed. This threat is amplified by the fact that the privilege required for exploitation is typically granted to system administrators, making the attack surface more accessible within normal operational procedures. The vulnerability also presents a significant risk to compliance requirements and data protection standards since it could enable unauthorized access to confidential virtual machine data or system configuration files.
Mitigation strategies for CVE-2008-4281 should prioritize immediate patch deployment to the affected VMware ESXi 3.5 versions, ensuring that systems are updated to the latest security patches that address the directory traversal flaw. Organizations should also implement comprehensive privilege management protocols that limit the scope of Datastore.FileManagement privileges to only those administrators who absolutely require such access. Network segmentation and monitoring solutions should be deployed to detect anomalous file access patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the use of legitimate system privileges to gain elevated access. Security teams should conduct thorough vulnerability assessments of their virtualized environments and implement continuous monitoring to detect potential exploitation attempts. Additionally, system administrators should review and restrict unnecessary file management operations that could expose the system to path traversal attacks, particularly in environments where multiple administrators have access to datastore management functions.