CVE-2002-0676 in Mac OS X
Summary
by MITRE
SoftwareUpdate for MacOS 10.1.x does not use authentication when downloading a software update, which could allow remote attackers to execute arbitrary code by posing as the Apple update server via techniques such as DNS spoofing or cache poisoning, and supplying Trojan Horse updates.
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Analysis
by VulDB Data Team • 01/01/2025
The vulnerability described in CVE-2002-0676 represents a critical security flaw in the MacOS 10.1.x SoftwareUpdate mechanism that fundamentally undermines the integrity of the operating system update process. This weakness stems from the absence of proper authentication protocols during software download operations, creating a significant attack surface that adversaries can exploit to compromise system security. The vulnerability specifically affects the SoftwareUpdate component that manages the automatic downloading and installation of system updates, which is a core functionality designed to maintain system integrity and security posture.
The technical flaw manifests in the SoftwareUpdate process's failure to implement cryptographic verification or authentication mechanisms when communicating with Apple's update servers. This omission allows attackers to perform man-in-the-middle attacks by leveraging DNS spoofing or cache poisoning techniques to redirect update requests to malicious servers that appear legitimate to the client system. When a user's Mac attempts to download updates, the system accepts and installs software from these spoofed servers without validating the authenticity or integrity of the downloaded files. The vulnerability is classified under CWE-310 as a lack of authentication in a security-critical function, making it particularly dangerous as it bypasses fundamental security controls that should protect against unauthorized modifications to system software.
The operational impact of this vulnerability extends far beyond simple software corruption, as it enables remote code execution capabilities for attackers who successfully compromise the update process. When malicious actors supply Trojan Horse updates through spoofed servers, they can install backdoors, rootkits, or other malicious software that operates with system-level privileges. This represents a severe compromise of the principle of least privilege and allows attackers to gain persistent access to compromised systems. The vulnerability affects the entire MacOS 10.1.x ecosystem, potentially exposing thousands of systems to remote compromise, with the attack vector being particularly insidious because it operates at the system level and can bypass traditional endpoint protection mechanisms.
Mitigation strategies for this vulnerability require immediate implementation of network-level protections and system hardening measures. Organizations should deploy DNS security measures including DNSSEC validation and implement network monitoring to detect anomalous update traffic patterns. The recommended approach includes disabling automatic updates until proper authentication mechanisms are implemented, configuring secure DNS servers, and establishing network segmentation to limit the potential impact of successful attacks. From an ATT&CK framework perspective, this vulnerability maps to T1071.004 (Application Layer Protocol: DNS) and T1547.001 (Registry Run Keys/Startup Folder) as attackers can leverage DNS manipulation to deliver malicious payloads and establish persistence. System administrators should also consider implementing software restriction policies and code signing verification mechanisms to prevent execution of unsigned or untrusted software updates. The vulnerability demonstrates the critical importance of maintaining secure update channels and implementing robust authentication protocols in all system components that handle critical security functions.