CVE-2003-1291 in ESX Server
Summary
by MITRE
VMware ESX Server 1.5.2 before Patch 4 allows local users to execute arbitrary programs as root via certain modified VMware ESX Server environment variables.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/04/2017
The vulnerability identified as CVE-2003-1291 represents a critical privilege escalation flaw within VMware ESX Server 1.5.2 before Patch 4, where local attackers can exploit specific environment variable modifications to execute arbitrary code with root privileges. This issue stems from insufficient input validation and improper environment variable handling within the VMware ESX Server runtime environment, creating a pathway for malicious actors to elevate their privileges from standard user level to administrative root access. The vulnerability specifically targets the way the system processes environment variables during certain operational sequences, allowing attackers to inject malicious values that bypass normal security controls and authentication mechanisms.
The technical exploitation mechanism relies on the manipulation of environment variables that are typically used for system configuration and operational purposes within the VMware ESX Server framework. When these variables are improperly validated or sanitized, attackers can inject crafted values that influence program execution paths, potentially leading to arbitrary code execution. This flaw operates at the system level where environment variable injection can affect critical system processes and services that run with elevated privileges. The vulnerability is particularly concerning because it requires only local access to the system, making it accessible to users who have already gained some level of system presence, such as through legitimate administrative access or other exploitation vectors.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can enable comprehensive system compromise and unauthorized access to sensitive data and resources. Once an attacker achieves root-level execution, they can manipulate system configurations, install persistent backdoors, access confidential information, and potentially use the compromised system as a launch point for further attacks within the network infrastructure. The vulnerability affects the core integrity of the VMware ESX Server environment, undermining the trust model that security-conscious organizations rely upon for virtualized infrastructure protection. This type of flaw directly impacts the security posture of virtualized environments where ESX Server is deployed, potentially exposing organizations to significant risk of data breaches and service disruptions.
Mitigation strategies for CVE-2003-1291 primarily involve applying the official VMware patch release that addresses the specific environment variable handling issues within ESX Server 1.5.2. Organizations should also implement comprehensive environment variable monitoring and validation procedures to detect and prevent unauthorized modifications to critical system variables. The vulnerability aligns with CWE-78 which describes improper neutralization of special elements used in OS commands, and relates to ATT&CK technique T1068 which covers privilege escalation through local exploitation. Additional defensive measures include implementing strict access controls, monitoring system logs for suspicious environment variable changes, and conducting regular security assessments of virtualized environments to identify similar vulnerabilities. System administrators should also consider implementing principle of least privilege configurations and regularly updating all virtualization components to ensure protection against known vulnerabilities and maintain overall system integrity.