CVE-2018-4235 in iOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "Messages" component. It allows local users to perform impersonation attacks via an unspecified injection.
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Analysis
by VulDB Data Team • 07/26/2024
The vulnerability identified as CVE-2018-4235 represents a significant security flaw within Apple's Messages application across multiple operating systems including iOS, macOS, tvOS, and watchOS. This issue affects versions prior to the specified security updates, creating a persistent risk for users who have not upgraded their systems. The vulnerability specifically resides within the Messages component, which serves as a critical communication channel for millions of users worldwide, making it particularly concerning from both a privacy and security perspective. The flaw enables local users to execute impersonation attacks through unspecified injection techniques, potentially allowing malicious actors to masquerade as legitimate contacts or system components.
The technical nature of this vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code," and more specifically relates to code injection flaws that allow attackers to execute arbitrary commands or manipulate application behavior. The unspecified injection mechanism suggests that the vulnerability may involve input validation failures within the Messages application's processing of incoming messages or contact data. This type of vulnerability typically occurs when applications fail to properly sanitize user inputs before processing them, creating opportunities for attackers to inject malicious code or data that gets executed by the application. The local nature of the attack means that exploitation requires physical access to the device or the ability to execute code on the target system, though the implications remain severe due to the privileged position of the Messages application.
From an operational impact perspective, this vulnerability creates substantial risks for users who rely on Apple's Messages application for both personal and professional communication. The impersonation capability could enable attackers to intercept messages, send fraudulent communications, or manipulate contact lists in ways that compromise user trust and data integrity. The attack vector being local means that even if users have strong network security measures in place, they remain vulnerable if their device is physically compromised or if malware has already been installed on the system. This vulnerability particularly affects users who depend heavily on iMessage for business communications, as the ability to impersonate contacts could lead to significant financial or reputational damage. The widespread adoption of Apple's ecosystem means that this vulnerability potentially affects a large user base across multiple device types, increasing the overall attack surface and impact potential.
The mitigation strategies for CVE-2018-4235 primarily involve updating affected systems to the latest available versions of iOS, macOS, tvOS, and watchOS. Apple's security updates typically address such vulnerabilities by implementing proper input sanitization, strengthening code validation mechanisms, and improving the application's resistance to injection attacks. Organizations should prioritize immediate deployment of these security patches across all affected devices within their environment, particularly in enterprise settings where communication security is paramount. Additionally, users should be educated about the importance of keeping their systems updated and should be aware of the potential risks associated with using outdated software versions. Security monitoring should include detection of unusual messaging patterns or unauthorized contact modifications that might indicate exploitation attempts. The vulnerability also highlights the importance of following the principle of least privilege and maintaining up-to-date security practices across all device types within an organization's infrastructure, as the attack requires only local access to potentially compromise the Messages application's integrity and confidentiality.