CVE-2018-9580 in Android
Summary
by MITRE
A Elevation of privilege vulnerability in the HTC bootloader. Product: Android. Versions: Android kernel. Android ID: A-76222002.
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Analysis
by VulDB Data Team • 04/13/2020
The vulnerability identified as CVE-2018-9580 represents a critical elevation of privilege flaw within the HTC bootloader implementation affecting Android kernel versions. This vulnerability stems from inadequate input validation and insufficient access controls within the bootloader's initialization process, creating a pathway for malicious actors to escalate their privileges from standard user level to system level access. The bootloader serves as the foundational component that initializes the operating system and establishes the security boundaries for device operations, making its integrity paramount to overall device security.
Technical exploitation of this vulnerability occurs through manipulation of bootloader parameters or firmware components that should remain protected from unauthorized modification. The flaw allows attackers to bypass the normal authentication mechanisms that typically prevent unauthorized access to system-level functions. This weakness specifically manifests in the bootloader's handling of secure boot processes and firmware validation routines, where insufficient cryptographic verification or improper privilege separation enables malicious code execution with elevated privileges. The vulnerability aligns with CWE-284 which addresses improper access control issues in software components, particularly those that govern system-level access permissions.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass complete device compromise. Once exploited, attackers can modify critical system files, install malicious applications with root-level permissions, and potentially extract sensitive data from the device. This vulnerability particularly affects HTC devices running Android versions that incorporate the vulnerable bootloader implementation, creating a widespread security risk across multiple device models and firmware versions. The attack surface is further expanded due to the bootloader's role in the early boot process, meaning exploitation can occur before the operating system's security mechanisms are fully operational.
Mitigation strategies for CVE-2018-9580 should prioritize immediate firmware updates from HTC and Android security teams, as these patches typically address the underlying bootloader validation issues and restore proper access controls. System administrators and device manufacturers must ensure comprehensive testing of firmware updates to prevent regression issues while maintaining security integrity. Additional protective measures include implementing secure boot configurations, enabling hardware-based security features such as trusted execution environments, and conducting regular security assessments of bootloader implementations. Organizations should also consider network-level monitoring to detect potential exploitation attempts and maintain detailed audit logs of bootloader activities. The vulnerability demonstrates the critical importance of securing boot processes and aligns with ATT&CK technique T1068 which covers local privilege escalation through kernel or boot process manipulation.