CVE-2017-2512 in macOS
Summary
by MITRE
An issue was discovered in certain Apple products. macOS before 10.12.5 is affected. The issue involves the "Sandbox" component. It allows attackers to conduct sandbox-escape attacks or cause a denial of service (memory corruption) via a crafted app.
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Analysis
by VulDB Data Team • 12/24/2020
The vulnerability identified as CVE-2017-2512 represents a critical sandbox escape flaw within Apple's macOS operating system affecting versions prior to 10.12.5. This security weakness resides within the sandbox component that serves as a fundamental security mechanism designed to isolate applications and limit their access to system resources and user data. The sandbox architecture implements mandatory access controls that prevent applications from performing unauthorized operations, thereby protecting the overall system integrity and user privacy. When exploited, this vulnerability undermines the core security model that Apple has implemented to contain potentially malicious software and prevent unauthorized system access.
The technical flaw manifests as a memory corruption issue that occurs within the sandbox implementation, allowing attackers to craft specially designed applications that can bypass the security boundaries established by the sandbox mechanism. This memory corruption vulnerability enables adversaries to escalate their privileges and execute arbitrary code outside the designated sandbox environment, effectively transforming a restricted application into a system-level threat. The attack vector requires the victim to install and run a crafted malicious application, which then exploits the underlying memory corruption to escape the sandbox constraints and gain elevated privileges. This type of vulnerability falls under the CWE-119 category of "Improper Access to Memory" and represents a classic sandbox escape scenario that has been documented in various security research publications and threat intelligence reports.
The operational impact of CVE-2017-2512 extends beyond simple privilege escalation, as it fundamentally compromises the security model that macOS relies upon to protect users from malicious software. Attackers who successfully exploit this vulnerability can conduct persistent surveillance, access sensitive user data, modify system files, and potentially establish backdoors for continued access. The memory corruption aspect also introduces potential for denial of service conditions where system stability may be compromised through controlled memory manipulation. This vulnerability aligns with several tactics described in the MITRE ATT&CK framework including privilege escalation, persistence, and defense evasion techniques. The attack scenario typically involves social engineering to convince users to install malicious applications, leveraging the trust model that exists within the macOS ecosystem where users often install applications from the App Store or trusted sources without sufficient scrutiny.
Mitigation strategies for this vulnerability primarily focus on immediate system updates to macOS 10.12.5 or later versions where Apple has implemented patches to address the memory corruption issues within the sandbox implementation. System administrators should prioritize deployment of these security updates across all affected macOS devices within their environments. Additional protective measures include implementing application whitelisting policies, monitoring for suspicious application installations, and conducting regular security audits of user environments. The vulnerability highlights the importance of maintaining up-to-date security patches and demonstrates how even fundamental security components like sandboxes can contain exploitable flaws that require continuous vigilance and proactive security management. Organizations should also consider implementing endpoint detection and response solutions that can identify anomalous behavior patterns consistent with sandbox escape attempts and provide real-time monitoring capabilities to detect potential exploitation of similar vulnerabilities in the future.