CVE-2018-4336 in macOS
Summary
by MITRE
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/22/2023
The vulnerability identified as CVE-2018-4336 represents a memory corruption flaw that existed in Apple's operating systems prior to the release of iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. This type of vulnerability falls under the category of memory safety issues that can potentially allow attackers to execute arbitrary code or cause system instability. The flaw was specifically addressed through enhanced memory handling mechanisms implemented in the subsequent software versions, demonstrating Apple's ongoing efforts to improve system security and stability.
Memory corruption vulnerabilities typically arise when software fails to properly manage memory allocation and deallocation processes, leading to situations where malicious actors can manipulate memory contents to execute unintended operations. This particular issue affected multiple Apple platforms simultaneously, indicating a fundamental flaw in the underlying memory management subsystem that was shared across the company's operating systems. The vulnerability's classification aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios, both of which are common vectors for memory corruption exploits.
The operational impact of CVE-2018-4336 extends beyond simple system instability to potentially enable sophisticated attack vectors that could compromise user data and system integrity. Systems running affected versions were susceptible to remote code execution attacks, where malicious actors could leverage the memory corruption to gain unauthorized access to devices. This vulnerability particularly affected users of mobile and desktop Apple devices who had not updated to the patched versions, creating a significant security gap that attackers could exploit to compromise user privacy and system security. The widespread nature of the affected platforms meant that the potential attack surface was extensive across Apple's ecosystem.
Apple's response to this vulnerability involved implementing improved memory handling mechanisms that specifically targeted the root cause of the corruption issue. The patching process required users to update their operating systems to versions that included enhanced memory management protocols and additional safeguards against buffer overflow conditions. Organizations and individuals affected by this vulnerability needed to prioritize updating their systems to prevent potential exploitation, as the window of exposure increased with the duration of time spent running unpatched software. The remediation process demonstrated Apple's approach to addressing memory safety issues through proactive system hardening rather than reactive patching, aligning with best practices in cybersecurity vulnerability management and the principles outlined in the ATT&CK framework's system hardening categories.