CVE-2018-4367 in iOS
Summary
by MITRE
A memory corruption issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1.
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Analysis
by VulDB Data Team • 12/25/2024
The vulnerability identified as CVE-2018-4367 represents a memory corruption flaw that existed in iOS versions prior to 12.1, specifically affecting the operating system's handling of input validation mechanisms. This type of vulnerability falls under the broader category of memory safety issues that can lead to arbitrary code execution or system instability when exploited by malicious actors. The flaw was particularly concerning because it could be triggered through normal user interactions with the device, making it a significant security risk for affected systems.
The technical root cause of this vulnerability stems from inadequate input validation within iOS's core frameworks, allowing attackers to craft malicious inputs that could corrupt memory structures during processing. When the system encountered malformed or unexpected input data, the improper validation mechanisms failed to properly sanitize or reject these inputs, leading to memory corruption that could potentially be leveraged for privilege escalation or remote code execution. This weakness aligns with CWE-121, which describes buffer overflow conditions, and represents a classic example of how insufficient input validation can create exploitable memory corruption vulnerabilities. The vulnerability was particularly dangerous because it could be triggered through various attack vectors including email attachments, web content, or other user-controllable inputs that would normally be processed by the system's core components.
The operational impact of CVE-2018-4367 extended beyond simple system instability to potentially enable sophisticated attack scenarios that could compromise entire device ecosystems. Mobile devices running affected iOS versions were vulnerable to attacks that could allow remote code execution, data theft, or system takeover through carefully crafted inputs that exploited the memory corruption weakness. Security researchers noted that the vulnerability's exploitation required minimal user interaction, making it particularly dangerous for enterprise environments where mobile device security is paramount. The issue was particularly concerning for organizations using iOS devices for sensitive operations, as it could potentially allow attackers to bypass traditional security controls and gain unauthorized access to corporate data. According to ATT&CK framework categorization, this vulnerability would map to techniques involving privilege escalation and execution through input validation flaws, representing a critical weakness in the mobile platform's security architecture.
Apple addressed this vulnerability through the release of iOS 12.1, which implemented enhanced input validation mechanisms and improved memory management controls to prevent the corruption scenarios that previously occurred. The fix involved strengthening the validation checks within the affected system components and implementing additional safeguards to ensure that malformed inputs could not corrupt memory structures. Organizations were advised to immediately deploy the iOS 12.1 update to protect their devices from exploitation attempts, as the vulnerability had been actively exploited in the wild prior to the release of the security patch. The remediation process required careful deployment planning to ensure that all affected devices were updated while maintaining business continuity, as the vulnerability could potentially allow attackers to gain persistent access to compromised systems. Security professionals emphasized that this vulnerability highlighted the importance of maintaining up-to-date mobile device security patches and implementing comprehensive vulnerability management programs to protect against similar memory corruption issues.