CVE-2003-0265 in SAP
Summary
by MITRE
Race condition in SDBINST for SAP database 7.3.0.29 creates critical files with world-writable permissions before initializing the setuid bits, which allows local attackers to gain root privileges by modifying the files before the permissions are changed.
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Analysis
by VulDB Data Team • 11/24/2024
The vulnerability described in CVE-2003-0265 represents a critical race condition within the SDBINST utility of SAP database version 7.3.0.29 that fundamentally undermines system security through improper file permission handling. This flaw occurs during the database installation process when the system creates critical system files with world-writable permissions before properly setting the necessary setuid bits. The timing discrepancy between file creation and permission initialization creates a window of opportunity for local attackers to exploit the system. The race condition aspect of this vulnerability means that an attacker must carefully time their actions to coincide with the specific moment when the installation process has created the vulnerable files but has not yet applied the appropriate security permissions. This type of vulnerability falls under the CWE-362 category of Race Conditions, specifically involving improper file permissions during file creation. The attack vector is particularly dangerous because it targets the installation phase of a database system, which typically runs with elevated privileges and creates files that may be used by the system for critical operations. When the installation process creates files with world-writable permissions before setting the setuid bits, it creates a scenario where any local user can modify these critical files, potentially allowing them to inject malicious code or alter system behavior. The implications are severe because the compromised files may be executed with root privileges once the setuid bits are properly applied, effectively granting attackers complete system control.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and data integrity violations. Attackers exploiting this race condition can modify critical installation files to include malicious code that will execute with root privileges, effectively bypassing normal system security controls. This vulnerability specifically targets the setuid mechanism, which is a fundamental security feature designed to allow programs to run with elevated privileges while maintaining user-level access control. The exploitation requires local access to the system since the vulnerability occurs during installation and involves modifying files that are typically accessible only to users with appropriate privileges. However, the race condition allows even unprivileged users to gain access to these files during the brief window when permissions are not yet properly set. The vulnerability's impact is further amplified because it affects the SAP database installation process, which is often performed on systems with significant business-critical data and applications. The potential for attackers to modify database installation components means they could compromise not only the database itself but also the underlying system security posture. This type of vulnerability aligns with ATT&CK technique T1068, which involves exploiting local system privileges to gain elevated access, and T1548.001, which covers abuse of setuid and setgid bits for privilege escalation.
Mitigation strategies for CVE-2003-0265 require immediate attention to patching the affected SAP database version and implementing proper file permission controls during installation processes. Organizations should ensure that all SAP database installations are updated to versions that address this specific race condition vulnerability, as the original version 7.3.0.29 is no longer supported and contains multiple security flaws. The fundamental fix involves modifying the installation process to ensure that all critical files are created with appropriate permissions from the outset, eliminating the window where world-writable permissions exist before setuid bits are applied. System administrators should implement proper file integrity monitoring to detect unauthorized modifications to critical installation files during the installation process. The vulnerability also highlights the importance of following secure coding practices, particularly in systems that handle setuid operations and file creation sequences. Organizations should consider implementing additional security controls such as file permission auditing, intrusion detection systems, and regular security assessments to identify similar race condition vulnerabilities. The exploitation of this vulnerability demonstrates the critical importance of proper privilege management and the need for security-conscious development practices that prevent race conditions in security-critical code sections. Implementing proper file locking mechanisms and ensuring atomic operations during file creation and permission setting can prevent similar vulnerabilities from occurring in other systems. The incident also underscores the necessity of regular security updates and patch management processes, as this vulnerability was present in a version of SAP database that was widely used and represents a classic example of how race conditions in system installation processes can create severe security risks.