CVE-2002-2018 in Integration Technologies
Summary
by MITRE
sastcpd in SAS/Base 8.0 might allow local users to gain privileges by setting the netencralg environment variable, which causes a segmentation fault.
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Analysis
by VulDB Data Team • 04/19/2019
The vulnerability identified as CVE-2002-2018 affects the sastcpd service component within SAS/Base version 8.0, representing a privilege escalation issue that could be exploited by local attackers. This flaw specifically manifests when the netencralg environment variable is manipulated, leading to a segmentation fault that potentially allows unauthorized users to elevate their system privileges. The vulnerability resides in the service's handling of environment variables during initialization or execution phases, creating an exploitable condition that could be leveraged for unauthorized system access. The segmentation fault occurs as a result of improper input validation or memory management when processing the maliciously crafted netencralg variable, potentially causing the service to behave unpredictably and granting elevated access rights to local users.
The technical implementation of this vulnerability involves the manipulation of environment variables within the SAS/Base 8.0 ecosystem, specifically targeting the sastcpd service daemon. When the netencralg environment variable is set to particular values, the service fails to properly validate or sanitize this input, leading to a memory corruption scenario that results in a segmentation fault. This type of vulnerability falls under the category of environment variable manipulation and improper input validation, which are commonly addressed by CWE-78 and CWE-121 standards. The segmentation fault itself represents a critical execution flaw that could be exploited through controlled memory corruption techniques, potentially allowing attackers to inject malicious code or manipulate program execution flow. The vulnerability demonstrates a classic buffer overflow or memory corruption pattern where environment variable values are processed without adequate bounds checking or sanitization.
The operational impact of CVE-2002-2018 extends beyond simple privilege escalation, as local users who can manipulate environment variables may gain access to sensitive system resources and data. This vulnerability affects systems running SAS/Base 8.0 where the sastcpd service is actively running, potentially exposing organizations to unauthorized access to analytical data, system configurations, and other sensitive information processed through the SAS environment. The segmentation fault condition could also result in service disruption or denial of access to legitimate users, creating both security and availability concerns. Attackers could leverage this vulnerability to establish persistent access to systems, potentially using the elevated privileges to install backdoors, modify system configurations, or exfiltrate sensitive data. The impact is particularly concerning in enterprise environments where SAS is used for critical data analysis and business intelligence operations.
Mitigation strategies for CVE-2002-2018 should focus on both immediate patching and operational controls to prevent exploitation. The primary remediation involves upgrading to a patched version of SAS/Base that addresses the environment variable handling issue in sastcpd service. Organizations should also implement strict environment variable controls and monitoring to detect unauthorized manipulation of system variables. System administrators should disable unnecessary services and ensure proper access controls are in place to limit local user privileges. The implementation of security monitoring tools that can detect abnormal segmentation fault patterns or environment variable changes would provide early warning of potential exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar issues in legacy systems. This vulnerability aligns with ATT&CK techniques related to privilege escalation and environment variable manipulation, emphasizing the need for comprehensive system hardening and access control measures. Organizations should also consider implementing application whitelisting and privilege separation mechanisms to minimize the impact of such vulnerabilities in their environments.