CVE-2018-4191 in iCloud
Summary
by MITRE
A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.
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Analysis
by VulDB Data Team • 08/22/2023
The vulnerability identified as CVE-2018-4191 represents a memory corruption flaw that existed in multiple Apple operating systems and applications prior to specific version releases. This issue was classified as a critical security weakness that could potentially allow attackers to execute arbitrary code or cause system instability through malformed input processing. The vulnerability specifically affected iOS versions before 12.0, tvOS versions before 12.0, watchOS versions before 5.0, Safari browser versions before 12.0, iTunes for Windows versions before 12.9, and iCloud for Windows versions before 7.7. The memory corruption aspect indicates that the flaw allowed for improper handling of memory allocation and deallocation processes, creating potential entry points for malicious actors to exploit system resources.
The technical nature of this memory corruption vulnerability aligns with common CWE classifications related to buffer overflows, heap corruption, and memory management errors that fall under CWE-121, CWE-122, and CWE-125. These weaknesses typically occur when applications fail to properly validate input data or when they manipulate memory without proper bounds checking mechanisms. The flaw likely manifested during processing of specific data structures or user inputs that were not adequately sanitized before being consumed by system components. Attackers could potentially leverage this vulnerability through crafted payloads that trigger the memory corruption during normal system operations, potentially leading to privilege escalation or complete system compromise.
From an operational perspective, the impact of CVE-2018-4191 extended across multiple attack vectors given the wide range of affected platforms and applications. The vulnerability could be exploited through various means including malicious web content delivered via Safari, compromised iTunes or iCloud synchronization processes, or through targeted attacks against specific user workflows on iOS devices. The affected software ecosystem created multiple potential entry points for threat actors, particularly given that iTunes and iCloud for Windows were widely used for file synchronization and backup operations. Organizations and individual users operating affected versions faced significant risk exposure, as the vulnerability could potentially enable remote code execution or denial of service conditions that could persist across multiple system components.
The remediation approach for this vulnerability required immediate deployment of updated software versions across all affected platforms. Apple's patching efforts focused on implementing improved validation mechanisms and enhanced memory management controls that addressed the root cause of the corruption issue. Security professionals recommended immediate upgrade cycles for all affected systems, particularly given the potential for zero-day exploitation of this flaw. The mitigation strategy aligned with standard ATT&CK framework techniques related to system patch management and software update processes, emphasizing the importance of maintaining current security patches to prevent exploitation of known vulnerabilities. Organizations implementing security controls should have prioritized this update as a critical remediation step to protect against potential exploitation through various attack vectors including web-based and network-based threats.