CVE-2005-2518 in Mac OS X
Summary
by MITRE
Buffer overflow in servermgrd in Mac OS X 10.3.9 and 10.4.2 allows remote attackers to execute arbitrary code during authentication.
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Analysis
by VulDB Data Team • 07/19/2024
The vulnerability identified as CVE-2005-2518 represents a critical buffer overflow flaw within the servermgrd service component of Mac OS X versions 10.3.9 and 10.4.2. This issue resides in the server management daemon that handles authentication processes for various network services, making it a prime target for remote exploitation. The buffer overflow occurs during the authentication phase when the servermgrd service processes incoming network requests, creating a pathway for malicious actors to inject and execute arbitrary code on affected systems. The vulnerability stems from insufficient input validation and improper buffer management within the service's authentication handling code, which directly aligns with CWE-121, which categorizes buffer overflow conditions where insufficient space is allocated for buffers. The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with complete system control, enabling them to establish persistent access, exfiltrate sensitive data, or deploy additional malware payloads.
The technical exploitation of CVE-2005-2518 requires an attacker to send specially crafted authentication requests to the vulnerable servermgrd service, which then overflows a fixed-size buffer in memory, potentially corrupting adjacent memory locations and allowing code execution. This type of vulnerability typically maps to ATT&CK technique T1059 where adversaries execute malicious code through legitimate system processes. The flaw exists because the service does not properly validate the length of authentication data before copying it into internal buffers, creating a classic stack-based buffer overflow condition. Attackers can leverage this vulnerability to bypass authentication mechanisms entirely or to gain unauthorized access to system resources, making it particularly dangerous in networked environments where the service is exposed to external traffic. The exploitation process often involves crafting malicious input that exceeds the buffer capacity, causing the overflow to overwrite return addresses or function pointers in the call stack.
The security implications of this vulnerability are severe as it affects the core authentication infrastructure of Mac OS X systems, potentially compromising the entire operating system's integrity and confidentiality. Systems running affected versions of Mac OS X are at risk of complete compromise, with attackers able to perform actions such as creating new user accounts, accessing sensitive system files, modifying system configurations, or establishing backdoors for continued access. The vulnerability's remote exploitability means that attackers do not require physical access to the system, making it particularly dangerous for network services that are publicly accessible. Organizations using these vulnerable versions face significant risks including data breaches, system takeover, and potential lateral movement within their networks, as compromised systems can serve as launching points for attacks on other networked devices. The vulnerability also impacts the availability of services, as successful exploitation could result in system crashes or service disruptions that affect legitimate users and business operations.
Mitigation strategies for CVE-2005-2518 primarily focus on immediate system updates and patch management, as Apple released security updates addressing this specific vulnerability in subsequent Mac OS X releases. System administrators should prioritize applying the official security patches from Apple to eliminate the buffer overflow condition. Network segmentation and access control measures should be implemented to limit exposure of vulnerable services to untrusted networks, while firewall rules can be configured to restrict access to the servermgrd service ports. Monitoring and intrusion detection systems should be enhanced to identify suspicious authentication patterns that might indicate exploitation attempts. Additionally, implementing application whitelisting policies and disabling unnecessary network services can reduce the attack surface. Organizations should also conduct regular vulnerability assessments to identify other potential buffer overflow conditions within their systems, as this vulnerability type remains common in legacy software implementations. The remediation process should include thorough testing of patches in controlled environments before widespread deployment to ensure compatibility with existing system configurations and services.