CVE-2012-0654 in Mac OS X
Summary
by MITRE
libsecurity in Apple Mac OS X before 10.7.4 accesses uninitialized memory locations during the processing of X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted certificate.
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Analysis
by VulDB Data Team • 12/01/2021
The vulnerability identified as CVE-2012-0654 resides within Apple Mac OS X's libsecurity component, specifically affecting versions prior to 10.7.4. This issue manifests during the processing of X.509 certificates, which are fundamental to secure communications and digital identity verification in internet protocols. The flaw represents a critical security weakness that could be exploited by remote attackers to gain unauthorized system access or disrupt service availability. The vulnerability occurs in the certificate validation and processing routines where the system fails to properly initialize memory locations before accessing them, creating potential entry points for malicious actors.
The technical implementation of this vulnerability stems from improper memory management within the X.509 certificate processing pipeline. When the system encounters a malformed or crafted certificate, it attempts to access memory locations that have not been properly initialized, leading to unpredictable behavior. This uninitialized memory access pattern creates opportunities for attackers to craft malicious certificates that trigger buffer overflows, memory corruption, or other exploitable conditions. The vulnerability is particularly dangerous because it operates at a low level within the security framework, potentially allowing attackers to bypass higher-level security controls and directly manipulate system memory structures.
From an operational perspective, this vulnerability presents significant risks to macOS systems running affected versions. Remote attackers can leverage this flaw to execute arbitrary code on target systems, potentially leading to complete system compromise and unauthorized access to sensitive data. The vulnerability also enables denial of service attacks that could cause applications to crash or become unresponsive, disrupting legitimate business operations. The impact extends beyond individual system compromise to potentially affect entire network infrastructures that rely on secure certificate validation for authentication and encryption services. Organizations using older macOS versions remain particularly vulnerable as the patch was released in the 10.7.4 update, making this an important remediation priority for enterprise security teams.
Security professionals should implement immediate mitigations including mandatory system updates to Mac OS X 10.7.4 or later versions, which contain the necessary patches to address the uninitialized memory access issue. Network administrators should also monitor for suspicious certificate-related traffic and implement certificate validation policies that can detect and block malformed certificates. The vulnerability aligns with CWE-457, which describes the use of uninitialized variables, and represents a classic example of how improper memory management can lead to severe security implications. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and code execution through system-level flaws, potentially enabling adversaries to establish persistent access and conduct advanced persistent threat operations. Organizations should also consider implementing additional security controls such as certificate pinning and enhanced network monitoring to detect potential exploitation attempts against this and similar vulnerabilities.