CVE-2018-5870 in Snapdragon Mobile
Summary
by MITRE
While loading a service image, an untrusted pointer dereference can occur in Snapdragon Mobile in versions SD 835, SDA660, SDX24.
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Analysis
by VulDB Data Team • 05/04/2020
The vulnerability identified as CVE-2018-5870 represents a critical security flaw within the Snapdragon Mobile platform ecosystem affecting multiple hardware generations including the SD 835, SDA660, and SDX24 chipsets. This issue stems from improper validation of pointer values during the service image loading process, creating a potential avenue for malicious exploitation that could compromise the entire mobile device security architecture. The vulnerability resides in the firmware layer of Qualcomm's Snapdragon processors, which serve as the foundation for numerous high-end smartphones and tablets worldwide.
The technical nature of this vulnerability manifests as an untrusted pointer dereference, a condition where the system attempts to access memory through a pointer value that has not been adequately validated or sanitized. During the service image loading sequence, the processor fails to properly validate the integrity of pointer references before executing memory access operations. This flaw allows an attacker to manipulate the pointer values in such a way that when the system attempts to dereference them, it may access unauthorized memory locations or execute arbitrary code. The vulnerability specifically impacts the Trusted Execution Environment and Secure Boot processes, which are fundamental to maintaining device security boundaries.
The operational impact of CVE-2018-5870 extends beyond simple privilege escalation, as it provides attackers with potential pathways to bypass critical security mechanisms such as kernel protections, secure boot chains, and trusted execution environments. An attacker exploiting this vulnerability could potentially gain root-level access to the device, enabling them to install malicious software, extract sensitive data, or manipulate device functionality without detection. This vulnerability is particularly concerning given that it affects widely deployed hardware platforms, meaning millions of devices could be potentially compromised. The exploitability of this flaw aligns with ATT&CK technique T1068, which describes local privilege escalation through kernel exploits, and CWE-476, which addresses null pointer dereference conditions.
Mitigation strategies for this vulnerability require immediate firmware updates from device manufacturers, as Qualcomm has released patches addressing the specific pointer validation issues within their Snapdragon firmware implementations. System administrators and security teams should prioritize deployment of these updates across affected devices, particularly in enterprise environments where mobile device security is paramount. Additionally, implementing runtime protections such as pointer validation checks, memory sandboxing, and enhanced kernel security modules can provide additional layers of defense against exploitation attempts. Organizations should also consider network-based monitoring solutions to detect potential exploitation attempts and maintain comprehensive incident response procedures to address any successful attacks that may occur. The vulnerability serves as a reminder of the critical importance of secure pointer management in embedded systems and the potential consequences when such fundamental security controls are inadequately implemented in mobile processor architectures.