CVE-2018-3563 in Android
Summary
by MITRE
In Qualcomm Android for MSM, Firefox OS for MSM, and QRD Android with all Android releases from CAF using the Linux kernel before security patch level 2018-04-05, untrusted pointer dereference in apr_cb_func can lead to an arbitrary code execution.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/21/2020
The vulnerability identified as CVE-2018-3563 represents a critical untrusted pointer dereference flaw affecting Qualcomm Android platforms, Firefox OS for MSM, and QRD Android implementations utilizing the Linux kernel. This issue resides within the apr_cb_func function, which serves as a callback handler in the application processing framework. The vulnerability manifests when the system processes untrusted input through callback mechanisms without proper validation of pointer integrity, creating a pathway for malicious actors to execute arbitrary code on affected devices. The flaw specifically impacts all Android releases from the Component Architecture Framework (CAF) that utilize the Linux kernel and remain unpatched prior to the security patch level of April 5, 2018.
The technical exploitation of this vulnerability follows a classic pointer dereference attack pattern where an attacker can manipulate input data to cause the system to dereference a malicious pointer within the apr_cb_func context. This allows for privilege escalation and arbitrary code execution with the privileges of the affected process. The vulnerability is categorized under CWE-476 which specifically addresses NULL pointer dereference conditions, though the actual implementation in this case involves untrusted pointer dereference rather than simple null pointer access. The flaw demonstrates the dangerous intersection of callback mechanism design and input validation, where the system assumes pointer validity without proper verification mechanisms.
Operationally, this vulnerability poses significant risks to mobile device security as it can be exploited through various attack vectors including malicious applications, compromised network communications, or social engineering campaigns targeting vulnerable Android implementations. The impact extends beyond individual device compromise to potential enterprise security breaches, especially in environments where these vulnerable platforms are deployed. Attackers can leverage this flaw to gain full system control, install persistent backdoors, access sensitive user data, and potentially escalate privileges to root level access. The vulnerability affects a broad range of Qualcomm-based devices that were shipped with affected kernel versions, making it particularly dangerous for widespread exploitation.
Mitigation strategies for CVE-2018-3563 primarily focus on applying the relevant security patches released by Qualcomm and Google, specifically targeting the security patch level of April 5, 2018 or later. Organizations should implement comprehensive device management policies to ensure timely patch deployment across all affected platforms, particularly in enterprise environments where multiple Qualcomm-based devices may be in use. Additional defensive measures include network-based monitoring for suspicious activities that might indicate exploitation attempts, implementing application whitelisting to prevent installation of malicious applications, and conducting regular security assessments of mobile device configurations. The vulnerability aligns with ATT&CK technique T1059 which covers command and scripting interpreter, as successful exploitation would enable attackers to execute arbitrary commands on compromised devices. Device manufacturers and service providers must also consider implementing runtime protection mechanisms and enhanced input validation routines to prevent similar vulnerabilities from emerging in future implementations.