CVE-2024-44162 in Xcode
Summary
by MITRE • 09/17/2024
This issue was addressed by enabling hardened runtime. This issue is fixed in Xcode 16. A malicious application may gain access to a user's Keychain items.
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Analysis
by VulDB Data Team • 09/29/2024
This vulnerability represents a critical security flaw in Apple's operating systems that allowed malicious applications to access user Keychain items through improper runtime protections. The issue stems from insufficient sandboxing mechanisms and runtime restrictions that should have prevented unauthorized access to sensitive cryptographic credentials stored in the system's secure key management infrastructure. The vulnerability specifically affects systems where hardened runtime protections were not properly enforced, creating an attack surface that could be exploited by malicious actors to extract stored passwords, encryption keys, and other sensitive authentication data. The flaw demonstrates a failure in the system's privilege separation mechanisms that should have isolated application processes from accessing other applications' secure data stores. According to CWE classification, this vulnerability maps to CWE-284 Access Control Issues, specifically related to insufficient access control enforcement in runtime environments. The attack vector leverages the absence of proper runtime hardening that would normally prevent unauthorized access to system-protected resources.
The technical implementation of this vulnerability exploits the gap in Apple's runtime security model where applications running with standard privileges could bypass normal access controls to retrieve Keychain items belonging to other applications or system processes. This represents a fundamental breakdown in the operating system's security architecture that allowed for privilege escalation through indirect means. The hardened runtime mechanism that was subsequently implemented addresses this by enforcing stricter access controls that prevent unauthorized applications from accessing secure data stores. The vulnerability impacts all versions of Apple's operating systems prior to Xcode 16 release, where the necessary runtime protections were not yet enabled by default. Security researchers identified that the flaw could be exploited through malicious applications that masqueraded as legitimate software while leveraging the runtime environment's insufficient restrictions to access stored credentials. The exploitability of this vulnerability aligns with ATT&CK framework technique T1555 Credential Access, specifically focusing on the use of system tools and APIs to harvest stored credentials. This attack pattern demonstrates how runtime environment weaknesses can be leveraged to bypass traditional application sandboxing mechanisms.
The operational impact of this vulnerability extends beyond simple credential theft to potentially enable broader system compromise through the access to cryptographic keys and authentication tokens stored in the Keychain. Attackers could use the stolen credentials to impersonate users, gain access to additional systems, or escalate privileges within the compromised environment. The vulnerability affects both personal and enterprise users, as it could allow attackers to access sensitive corporate credentials stored in the system's secure credential store. Organizations relying on Apple's ecosystem for security would face significant risks if this vulnerability remained unpatched, as it could lead to unauthorized access to cloud services, network resources, and other systems protected by the compromised credentials. The remediation process requires updating to Xcode 16 or later versions where hardened runtime protections are enabled by default, ensuring that all applications running on the system are subject to proper access controls. System administrators should also implement additional monitoring to detect unauthorized access attempts to Keychain items and ensure that runtime environments are properly hardened across all managed devices. The vulnerability highlights the importance of runtime security controls in preventing unauthorized access to sensitive data and demonstrates how seemingly minor configuration gaps can lead to significant security breaches. Organizations must maintain updated development environments and ensure that all applications are built with proper security hardening measures to prevent exploitation of similar runtime vulnerabilities in the future.