CVE-2018-4275 in iOS
Summary
by MITRE
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1.
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Analysis
by VulDB Data Team • 03/03/2020
The vulnerability identified as CVE-2018-4275 represents a memory corruption flaw that existed in Apple's iOS operating system prior to version 11.4.1. This type of vulnerability falls under the broader category of memory safety issues that can lead to unpredictable system behavior and potential exploitation by malicious actors. The flaw was specifically addressed through enhanced memory handling mechanisms within the iOS framework, indicating that the underlying issue involved improper memory management practices that could result in buffer overflows or other memory-related anomalies. The vulnerability affects the core operating system functionality and represents a critical security concern that required immediate patching to prevent potential exploitation.
The technical nature of this memory corruption issue aligns with common CWE classifications related to memory safety vulnerabilities, particularly those involving buffer overflows or improper memory deallocation patterns. Such flaws typically arise when software applications fail to properly validate memory boundaries or when they do not adequately manage memory allocation and deallocation processes. The fact that this vulnerability required a specific iOS version update for remediation suggests that the flaw was deeply embedded within the system's memory management subsystem, potentially affecting multiple components that rely on proper memory handling protocols. The vulnerability's designation as a memory corruption issue indicates that it could potentially allow attackers to manipulate memory contents, leading to arbitrary code execution or system instability.
From an operational impact perspective, this vulnerability posed significant risks to iOS devices running affected versions, as memory corruption issues can enable attackers to gain unauthorized access to system resources or execute malicious code with elevated privileges. The exploitability of such vulnerabilities often depends on the specific memory layout and protection mechanisms in place, with memory corruption flaws typically requiring sophisticated exploitation techniques that leverage the system's memory management weaknesses. The impact extends beyond simple system crashes, potentially enabling persistent access to user data, device control, or network communication interception. This type of vulnerability aligns with ATT&CK technique T1059 which covers command and script injection, as memory corruption can provide the foundation for executing malicious payloads through system-level code manipulation.
The remediation approach for CVE-2018-4275 involved Apple implementing improved memory handling procedures and strengthening the underlying memory management infrastructure within iOS. This typically includes enhanced bounds checking, improved memory allocation algorithms, and better garbage collection mechanisms to prevent the conditions that previously led to memory corruption. Security researchers and system administrators should prioritize the deployment of iOS 11.4.1 and subsequent updates to protect against potential exploitation of this vulnerability. The fix represents a defensive measure that addresses the root cause of the memory handling issue rather than merely patching symptoms, aligning with industry best practices for vulnerability remediation. Organizations should verify that all iOS devices within their environment have been updated to versions that include the memory handling improvements to ensure comprehensive protection against this and related memory corruption vulnerabilities.