CVE-2019-8596 in iTunes
Summary
by MITRE
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, Safari 12.1.1, iTunes for Windows 12.9.5, iCloud for Windows 7.12. Processing maliciously crafted web content may lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 09/26/2023
The vulnerability identified as CVE-2019-8596 represents a critical memory corruption issue affecting multiple Apple operating systems and applications. This flaw resides in the memory management subsystem of Apple's ecosystem, specifically impacting iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, Safari 12.1.1, iTunes for Windows 12.9.5, and iCloud for Windows 7.12. The vulnerability stems from inadequate memory handling mechanisms that fail to properly validate or sanitize memory operations when processing web content, creating potential entry points for malicious actors.
The technical nature of this vulnerability aligns with CWE-122, which describes buffer overflow conditions that occur when a program writes data beyond the boundaries of a fixed-length buffer. The flaw manifests when applications process maliciously crafted web content that triggers improper memory allocation or deallocation sequences. Attackers can exploit this weakness by crafting specially designed web pages or content that, when rendered by affected applications, causes memory corruption. This corruption can lead to unpredictable behavior including application crashes, memory corruption, or most critically, arbitrary code execution. The vulnerability's impact extends across multiple platforms due to shared memory management libraries and web rendering engines used across Apple's ecosystem.
The operational impact of CVE-2019-8596 is significant as it enables attackers to achieve remote code execution on affected systems without requiring user interaction beyond visiting a malicious webpage. This represents a severe threat vector that can be leveraged for various malicious activities including data exfiltration, system compromise, or deployment of additional malware. The vulnerability's exploitation potential is particularly concerning given that it affects web browsers and applications that are frequently used in enterprise and personal environments. Security researchers have classified this as a high-severity issue due to its remote exploitability and the potential for privilege escalation.
Mitigation strategies for CVE-2019-8596 primarily involve immediate deployment of the security updates released by Apple, including iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, Safari 12.1.1, iTunes for Windows 12.9.5, and iCloud for Windows 7.12. Organizations should implement comprehensive patch management protocols to ensure all affected systems receive updates promptly. Network security measures including web content filtering and sandboxing mechanisms can provide additional protection layers while awaiting full patch deployment. Security teams should monitor for indicators of compromise related to this vulnerability and implement threat hunting activities to detect potential exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059.007 for command and scripting interpreter, as exploitation typically involves executing malicious code through compromised web browsers or applications. Organizations should also consider implementing application whitelisting policies and restricting access to potentially malicious websites to reduce attack surface exposure.