CVE-2019-1369 in Open Enclave SDK
Summary
by MITRE
An information disclosure vulnerability exists when affected Open Enclave SDK versions improperly handle objects in memory, aka 'Open Enclave SDK Information Disclosure Vulnerability'.
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Analysis
by VulDB Data Team • 09/26/2020
The CVE-2019-1369 vulnerability represents a critical information disclosure flaw within the Open Enclave SDK ecosystem, a software development kit designed to enable confidential computing through hardware-based isolation. This vulnerability stems from improper memory handling mechanisms within the SDK's object management system, creating potential pathways for unauthorized access to sensitive data that should remain protected within the secure enclave environment. The flaw specifically manifests when the SDK fails to properly manage memory objects, leading to situations where confidential information might be exposed through memory inspection techniques or side-channel attacks.
The technical root cause of this vulnerability lies in the SDK's inadequate memory management protocols, which can result in objects remaining in memory beyond their intended lifecycle or being improperly cleared when no longer needed. This improper handling creates memory artifacts that persist in system memory, potentially exposing sensitive data including cryptographic keys, personal information, or other confidential parameters that should remain isolated within the enclave's protected memory space. The vulnerability is particularly concerning because it undermines the fundamental security guarantees that enclaves are designed to provide, allowing for information leakage that could compromise the entire confidential computing framework.
From an operational impact perspective, this vulnerability significantly weakens the security posture of systems relying on Open Enclave SDK for confidential computing operations. Attackers who can exploit this flaw may gain access to sensitive data that was intended to be protected within the enclave, potentially leading to data breaches, identity theft, or compromise of cryptographic keys used for encryption and authentication. The vulnerability affects all versions of the Open Enclave SDK that exhibit the improper memory handling behavior, making it a widespread concern for organizations deploying confidential computing solutions. The impact extends beyond individual applications to potentially compromise entire infrastructure components that depend on the SDK's security guarantees.
Security mitigations for CVE-2019-1369 primarily involve updating to patched versions of the Open Enclave SDK where the memory handling mechanisms have been corrected to properly manage object lifecycles and memory cleanup. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive the necessary updates promptly. Additionally, system administrators should conduct thorough security assessments to identify any potential exploitation attempts and monitor for unusual memory access patterns that might indicate exploitation of this vulnerability. The mitigation strategy should also include reviewing existing security configurations and ensuring that proper memory sanitization procedures are in place to prevent information leakage through memory artifacts.
This vulnerability aligns with CWE-200, which addresses "Information Exposure," and represents a specific implementation flaw in memory management that violates the principle of least privilege and data protection. The attack surface for this vulnerability maps to ATT&CK technique T1005, "Data from Local System," as it enables unauthorized access to sensitive data residing in memory. Organizations should consider this vulnerability as part of their broader confidential computing security strategy, implementing additional monitoring and detection measures to identify potential exploitation attempts and ensure the integrity of their enclave-based applications. The vulnerability also highlights the importance of proper memory management in security-critical systems, emphasizing the need for robust testing and validation of memory handling procedures in security frameworks.