CVE-2017-0750 in Android
Summary
by MITRE
A elevation of privilege vulnerability in the Upstream Linux file system. Product: Android. Versions: Android kernel. Android ID: A-36817013.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/15/2022
The vulnerability identified as CVE-2017-0750 represents a critical elevation of privilege flaw within the Android kernel's upstream Linux file system implementation. This weakness specifically affects the Linux kernel version 3.18 and earlier, which forms the foundation of Android's kernel-level operations. The vulnerability manifests in how the kernel handles certain file system operations, creating an opportunity for malicious actors to escalate their privileges from standard user level to root access. The Android ID A-36817013 further contextualizes this issue within the Android security framework, indicating it was recognized and tracked by Google's security team. This vulnerability affects devices running Android versions that utilize the vulnerable kernel versions, potentially compromising millions of Android devices globally.
The technical root cause of CVE-2017-0750 lies in improper handling of file system operations within the kernel's security mechanisms. Specifically, the vulnerability occurs during the processing of certain file system calls that should enforce strict access controls and privilege checks. The flaw allows an attacker to manipulate kernel data structures or bypass existing security boundaries that normally prevent unprivileged users from gaining elevated privileges. This typically involves exploiting race conditions or improper validation of file system operations that should be restricted to kernel-level processes. The vulnerability is categorized under CWE-264, which deals with permissions, privileges, and access controls, making it a classic example of improper privilege management in kernel space. The issue demonstrates how file system-level security can be undermined when kernel components fail to properly validate or enforce access controls during critical operations.
The operational impact of this vulnerability extends far beyond simple privilege escalation, as it provides attackers with complete control over affected Android devices. Once exploited, an attacker can gain root access to the device, enabling them to modify system files, install malicious applications, access all user data, and potentially create persistent backdoors. This level of access allows for complete device compromise, making it particularly dangerous for mobile devices that often contain sensitive personal and corporate information. The vulnerability affects the core operating system functionality, meaning that any application or service running on the device becomes potentially compromised. From an attacker's perspective, this represents a high-value target because it eliminates the need for additional exploitation techniques to gain system-level access. The vulnerability's presence in the upstream Linux kernel also means that it affects multiple Android device manufacturers, as they all rely on the same kernel components, creating widespread exposure across the Android ecosystem.
Mitigation strategies for CVE-2017-0750 primarily focus on kernel updates and security patches provided by device manufacturers and Google. The most effective approach involves applying the relevant security patches that address the specific kernel vulnerability in question, typically through Android security updates or manufacturer-specific patches. Organizations and users should ensure their devices receive and install all available security updates promptly, as the vulnerability remains exploitable until patched. Device manufacturers should implement robust patch management processes to ensure timely delivery of security fixes to their users. Additional mitigations include implementing proper device hardening measures such as disabling unnecessary services, restricting file system access for applications, and employing application sandboxing techniques. From a defensive perspective, network monitoring solutions should be configured to detect suspicious file system activities that might indicate exploitation attempts. The vulnerability highlights the importance of maintaining up-to-date kernel versions and demonstrates how upstream kernel security issues can have cascading effects throughout the entire Android ecosystem, making continuous security monitoring and patch management essential for device security.