CVE-2023-52550 in HarmonyOS
Summary
by MITRE • 04/08/2024
Vulnerability of data verification errors in the kernel module. Impact: Successful exploitation of this vulnerability may affect service confidentiality.
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Analysis
by VulDB Data Team • 08/20/2024
This vulnerability resides within kernel module data verification mechanisms, representing a critical weakness in the operating system's core security infrastructure. The flaw manifests as insufficient input validation and error handling within kernel-space components, creating potential pathways for malicious actors to manipulate system behavior. Such vulnerabilities typically arise from inadequate bounds checking, improper memory management, or flawed cryptographic implementations within kernel modules that handle sensitive data processing. The vulnerability falls under the broader category of kernel-level security flaws that can undermine fundamental system integrity and confidentiality guarantees. According to CWE classification, this represents a variant of CWE-129 Input Validation and Conformance, specifically focusing on inadequate verification mechanisms in privileged execution contexts. The ATT&CK framework categorizes this under privilege escalation techniques where adversaries leverage kernel vulnerabilities to gain unauthorized access to confidential information.
The technical implementation of this vulnerability stems from improper validation of data structures passed between user-space applications and kernel modules. When kernel modules receive unverified data inputs, they may process malformed or unexpected values that lead to unpredictable system behavior. This can result in information disclosure through memory leaks, data corruption, or unauthorized data access patterns. The vulnerability is particularly dangerous because kernel modules operate with the highest privilege levels, making any verification errors potentially catastrophic for system security. Attackers can exploit this weakness by crafting specific inputs that bypass normal validation checks, potentially leading to the exposure of sensitive kernel data or confidential system information. The flaw demonstrates a classic security principle violation where insufficient validation in privileged contexts creates attack surfaces that can be leveraged for data exfiltration or service disruption.
The operational impact of this vulnerability extends beyond simple data confidentiality concerns to encompass potential system stability and integrity threats. When exploited successfully, the vulnerability could allow attackers to access kernel memory regions containing sensitive information such as encryption keys, authentication credentials, or proprietary system data. This compromise directly affects service confidentiality as described in the vulnerability assessment, potentially leading to unauthorized access to protected information and undermining the trust model of the operating system. The attack surface is particularly concerning because kernel-level vulnerabilities are often difficult to detect and remediate, requiring system reboots or complete kernel updates. Organizations may experience cascading effects where this vulnerability enables further exploitation attempts against other system components, as the compromised kernel module could provide attackers with elevated privileges for additional attacks.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The primary recommendation involves applying vendor-provided patches and updates that correct the data verification errors within affected kernel modules. System administrators should implement comprehensive monitoring solutions to detect anomalous kernel behavior that might indicate exploitation attempts. Security teams should conduct thorough vulnerability assessments to identify all kernel modules that may be susceptible to similar verification flaws, implementing principle of least privilege configurations where possible. Additional protective measures include enabling kernel address space layout randomization, implementing kernel module signing requirements, and deploying intrusion detection systems specifically designed to monitor kernel-level activities. Organizations should also consider implementing memory protection mechanisms such as stack canaries and control flow integrity checks to prevent exploitation attempts. The remediation process must be carefully coordinated with system downtime schedules to ensure complete patch deployment while maintaining operational continuity. Regular security audits of kernel modules and continuous monitoring of system logs for suspicious kernel activities should become standard operational procedures to prevent future exploitation attempts.