CVE-2019-8577 in iTunes
Summary
by MITRE
An input validation issue was addressed with improved memory handling. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, watchOS 5.2.1, iTunes for Windows 12.9.5, iCloud for Windows 7.12. An application may be able to gain elevated privileges.
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Analysis
by VulDB Data Team • 09/26/2023
The vulnerability identified as CVE-2019-8577 represents a critical input validation flaw that existed within Apple's operating systems and applications, specifically affecting versions prior to the security updates released in 2019. This issue stems from inadequate memory handling practices during input processing, creating a potential pathway for malicious applications to escalate their privileges and gain unauthorized access to system resources. The vulnerability was particularly concerning as it affected multiple platforms including iOS, macOS, tvOS, and watchOS, indicating a widespread impact across Apple's ecosystem. The flaw manifested in how the affected systems handled memory allocation and input validation, creating opportunities for attackers to exploit memory corruption patterns that could lead to privilege escalation. According to the security advisory, the issue was addressed through enhanced memory management protocols and improved input validation mechanisms that prevent malformed inputs from causing unintended memory behavior.
The technical exploitation of CVE-2019-8577 leverages memory handling weaknesses that align with common software security vulnerabilities classified under CWE-129, which deals with insufficient input validation, and CWE-119, which addresses memory corruption issues. Attackers could potentially craft malicious inputs that, when processed by the vulnerable systems, would trigger memory corruption patterns leading to privilege escalation. The vulnerability's impact extends beyond simple memory management issues as it creates potential attack vectors for privilege escalation techniques that align with ATT&CK framework's privilege escalation tactics, specifically targeting the use of system-level memory corruption to gain elevated privileges. This type of vulnerability typically requires an application to already be running on the system or to have some level of user interaction to exploit, making it particularly dangerous in environments where users might unknowingly execute malicious code.
The operational impact of CVE-2019-8577 was significant for organizations and individual users who relied on Apple's ecosystem, as the privilege escalation capability could allow attackers to bypass normal security restrictions and access sensitive system functions. This vulnerability particularly affected environments where Apple devices were used in enterprise settings, as the ability to gain elevated privileges could lead to complete system compromise and data exfiltration. The vulnerability was particularly concerning for users who had not yet applied the security updates, as the exploit could be leveraged to gain unauthorized access to system resources including user data, network communications, and administrative functions. Organizations needed to prioritize patch management for this vulnerability due to its potential for creating persistent access points within their networks and the relatively straightforward exploitation methods that could be employed by threat actors.
Mitigation strategies for CVE-2019-8577 centered on immediate deployment of the security updates released by Apple, including iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, watchOS 5.2.1, iTunes for Windows 12.9.5, and iCloud for Windows 7.12. The recommended approach involved comprehensive patch management across all affected platforms to ensure that the improved memory handling mechanisms were properly implemented. Additional security measures included implementing network monitoring to detect potential exploitation attempts, conducting vulnerability assessments to identify systems that had not yet been patched, and establishing incident response procedures to address potential compromise scenarios. Security teams were advised to maintain continuous monitoring of their Apple device fleets to ensure timely deployment of security patches and to implement additional controls such as application whitelisting and user access restrictions to limit the potential impact of any remaining vulnerabilities in the ecosystem.