CVE-2017-7015 in macOS
Summary
by MITRE
An issue was discovered in certain Apple products. macOS before 10.12.6 is affected. The issue involves the "Audio" component. It allows remote attackers to obtain sensitive information from process memory or cause a denial of service (memory corruption) via a crafted audio file.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/05/2021
The vulnerability identified as CVE-2017-7015 represents a critical security flaw within Apple's macOS operating system affecting versions prior to 10.12.6. This weakness resides within the audio processing component of the system, specifically exposing users to significant risks through maliciously crafted audio files. The vulnerability demonstrates how multimedia processing libraries can become attack vectors for sophisticated exploitation techniques that bypass traditional security boundaries. The flaw essentially allows threat actors to manipulate audio file processing routines in ways that can lead to information disclosure or system instability, making it particularly dangerous in environments where users might encounter untrusted audio content.
The technical nature of this vulnerability stems from improper input validation and memory handling within the audio processing subsystem. When the system attempts to parse and process specially crafted audio files, it fails to properly validate the file structure and content, leading to memory corruption issues. This memory corruption can manifest in two primary ways: either by allowing attackers to read sensitive information from process memory spaces that should remain protected, or by causing the system to crash and potentially leading to a denial of service condition. The vulnerability operates at the kernel level within the audio processing framework, making it particularly potent as it can leverage the privileges of the audio processing services to access memory locations that would normally be restricted.
From an operational perspective, this vulnerability creates substantial risk for macOS users who may encounter malicious audio files through various attack vectors including email attachments, web downloads, or malicious websites. The remote exploitation capability means that attackers can potentially compromise systems without requiring physical access or local user interaction beyond simply opening or playing the malicious audio file. This makes the vulnerability particularly concerning for enterprise environments where users may inadvertently encounter compromised audio content in shared documents or collaborative platforms. The potential for information disclosure through memory reading attacks could expose sensitive data including user credentials, application data, or system configuration details that could be leveraged for further attacks.
The attack surface for CVE-2017-7015 aligns with several ATT&CK framework techniques including initial access through malicious file delivery and privilege escalation through kernel-level exploitation. This vulnerability also maps to CWE-125, which describes out-of-bounds read conditions, and CWE-129, which covers improper validation of array index values. The memory corruption aspects of this vulnerability align with CWE-787, which addresses out-of-bounds write operations that can lead to arbitrary code execution. Security professionals should note that this vulnerability represents a classic example of how multimedia processing components can become attack vectors, particularly when they lack proper bounds checking and input sanitization mechanisms. The impact extends beyond simple denial of service to include potential privilege escalation and information disclosure scenarios.
Mitigation strategies for CVE-2017-7015 primarily focus on immediate system updates to macOS 10.12.6 or later versions where Apple has implemented proper input validation and memory handling fixes within the audio processing component. Organizations should also implement network-level controls to block suspicious audio file types and establish robust patch management procedures to ensure all systems remain current with security updates. Additionally, user education regarding safe file handling practices and the importance of avoiding untrusted audio content can provide additional defense layers. Security monitoring should include detection of unusual audio processing activity and memory access patterns that might indicate exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that protect against various attack vectors while maintaining system usability and performance standards.