CVE-2018-4449 in macOS
Summary
by MITRE
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to macOS Mojave 10.14.2.
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Analysis
by VulDB Data Team • 04/18/2020
The vulnerability identified as CVE-2018-4449 represents a memory corruption flaw that existed in Apple's macOS operating system prior to the release of version 10.14.2. This issue falls under the broader category of memory safety vulnerabilities that can potentially lead to arbitrary code execution or system instability when exploited by malicious actors. The flaw was specifically addressed through enhanced memory handling mechanisms implemented in the security update for macOS Mojave.
The technical nature of this memory corruption vulnerability stems from inadequate memory management practices within the affected macOS components. Memory corruption vulnerabilities typically occur when software fails to properly validate or handle memory operations, leading to situations where attacker-controlled data can overwrite critical memory regions. This particular flaw likely involved improper bounds checking or memory allocation handling that could be exploited to manipulate program execution flow. The vulnerability's classification aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions that are common in memory corruption scenarios.
The operational impact of CVE-2018-4449 extends beyond simple system instability to potentially enable sophisticated attack vectors. Attackers could leverage this memory corruption to execute arbitrary code with elevated privileges, potentially compromising the entire system. The vulnerability's presence in pre-10.14.2 versions of macOS meant that a significant portion of users were exposed to potential exploitation, particularly in enterprise environments where system updates might be delayed. This type of vulnerability is particularly concerning because it could be exploited through various attack vectors including malicious email attachments, compromised websites, or social engineering campaigns targeting macOS users.
The remediation for this vulnerability required users to update to macOS Mojave 10.14.2 or later versions, which included patched memory handling routines that addressed the specific corruption patterns. Security professionals should note that this vulnerability demonstrates the importance of timely patch management for operating system components, as memory corruption issues often serve as initial access vectors for more sophisticated attacks. From an ATT&CK framework perspective, this vulnerability could be categorized under techniques involving privilege escalation and execution through memory corruption, potentially leading to persistence mechanisms and lateral movement within compromised networks. Organizations should implement comprehensive patch management policies that prioritize security updates for operating systems and ensure that all macOS devices are maintained at supported versions to prevent exploitation of such memory corruption vulnerabilities.