CVE-2012-0651 in Mac OS X
Summary
by MITRE
The directory server in Directory Service in Apple Mac OS X 10.6.8 allows remote attackers to obtain sensitive information from process memory via a crafted message.
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Analysis
by VulDB Data Team • 12/01/2021
The vulnerability identified as CVE-2012-0651 represents a significant information disclosure flaw within Apple Mac OS X 10.6.8's Directory Service directory server component. This issue resides in the core system service responsible for managing user accounts, authentication, and directory information within the operating system. The vulnerability specifically affects the directory server implementation that handles network requests and processes directory service messages, creating a potential attack surface for remote adversaries seeking to extract sensitive system data.
The technical flaw manifests through improper input validation and memory handling within the directory server's message processing routines. When the server receives a specially crafted message, it fails to properly sanitize or validate the incoming data structure, leading to memory disclosure vulnerabilities. This weakness allows attackers to craft malicious directory service requests that, when processed by the vulnerable system, cause the server to expose portions of its internal memory space. The disclosed information typically includes system pointers, configuration data, and potentially sensitive authentication credentials or session information that could be leveraged for further exploitation.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposed memory contents could contain critical system data that aids in subsequent attack phases. Attackers could potentially extract memory addresses that help in bypassing security mechanisms such as address space layout randomization, or obtain credential information that could be used for privilege escalation attacks. The remote nature of this vulnerability means that attackers do not require physical access to the system or local network privileges to exploit the flaw, making it particularly dangerous in enterprise environments where directory services are heavily utilized. This vulnerability aligns with CWE-200, which specifically addresses information exposure, and represents a classic example of how improper input handling can lead to memory corruption and information leakage scenarios.
Mitigation strategies for CVE-2012-0651 primarily focus on immediate system updates and configuration hardening. Apple released patches for Mac OS X 10.7 and later versions that addressed this vulnerability, making it essential for organizations to upgrade to supported operating system versions. System administrators should also implement network segmentation and access controls to limit exposure of directory services to untrusted networks. The implementation of intrusion detection systems can help monitor for suspicious directory service traffic patterns that might indicate exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify any remaining instances of the vulnerable software. This vulnerability demonstrates the importance of maintaining current system patches and highlights the critical need for proper memory management and input validation in system services, particularly those handling network communications. Organizations should also consider implementing network monitoring solutions that can detect anomalous directory service behavior and provide alerts for potential exploitation attempts.
The broader implications of this vulnerability extend to enterprise security posture and compliance requirements. Many organizations rely heavily on directory services for user authentication and access control, making vulnerabilities in these systems particularly dangerous. The exposure of memory contents could potentially lead to credential theft, privilege escalation, or denial of service conditions that could impact business operations. Security frameworks such as the ATT&CK matrix categorize this type of vulnerability under information gathering techniques, where adversaries collect system information to plan further attacks. This vulnerability also underscores the importance of defense in depth strategies, where multiple layers of security controls work together to protect against various attack vectors. Organizations should maintain comprehensive incident response plans that include procedures for handling directory service vulnerabilities, as these types of flaws can often serve as initial access points for more sophisticated attacks.