CVE-2016-8418 in Android
Summary
by MITRE
A remote code execution vulnerability in the Qualcomm crypto driver could enable a remote attacker to execute arbitrary code within the context of the kernel. This issue is rated as Critical due to the possibility of remote code execution in the context of the kernel. Product: Android. Versions: N/A. Android ID: A-32652894. References: QC-CR#1077457.
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Analysis
by VulDB Data Team • 11/12/2022
The vulnerability described in CVE-2016-8418 represents a critical remote code execution flaw within the Qualcomm crypto driver component of Android systems. This issue resides in the kernel-level cryptographic subsystem that handles encryption and decryption operations, making it particularly dangerous as it operates with the highest privilege level. The vulnerability stems from improper input validation and memory handling within the driver's implementation, creating a pathway for malicious actors to inject and execute arbitrary code directly within the kernel space. Such a flaw fundamentally undermines the security model of Android devices, as kernel-level execution bypasses all user-space security controls and protections.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which addresses out-of-bounds read vulnerabilities. Attackers can exploit this weakness by crafting specially crafted cryptographic operations or inputs that trigger memory corruption within the Qualcomm crypto driver. The flaw allows for privilege escalation from user-space applications to kernel-level execution, enabling attackers to gain complete control over the device. This type of vulnerability is particularly concerning because it can be exploited remotely without requiring physical access or user interaction, making it a prime target for sophisticated attack campaigns.
The operational impact of CVE-2016-8418 extends beyond individual device compromise, affecting millions of Android devices that utilize Qualcomm chipsets. The vulnerability's presence in the crypto driver means that any cryptographic operations performed on affected devices could potentially be exploited, including secure communications, digital signatures, and encryption of sensitive data. This creates a widespread security risk across various Android applications and system functions that depend on cryptographic services. The remote execution capability means that attackers can compromise devices from anywhere in the world, making this vulnerability particularly attractive to threat actors seeking large-scale exploitation campaigns. The issue affects the fundamental security infrastructure of affected devices, potentially enabling data theft, persistent backdoors, and complete device takeover.
Mitigation strategies for this vulnerability require immediate patching of the Qualcomm crypto driver through official Android security updates. Organizations should implement network monitoring to detect potential exploitation attempts and establish incident response procedures for compromised devices. The fix typically involves input validation improvements and memory management corrections within the driver code to prevent buffer overflows and memory corruption. Security teams should also consider implementing additional layers of protection such as kernel address space layout randomization and exploit prevention mechanisms. This vulnerability demonstrates the critical importance of maintaining up-to-date cryptographic components and highlights the need for comprehensive security testing of kernel-level drivers. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the kernel execution environment where attackers can establish persistent access and execute malicious code with the highest system privileges.