CVE-2017-8236 in Android
Summary
by MITRE
In all Android releases from CAF using the Linux kernel, a buffer overflow vulnerability exists in an IPA driver.
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Analysis
by VulDB Data Team • 12/27/2020
The vulnerability identified as CVE-2017-8236 represents a critical buffer overflow condition within the IPA (Image Processing Accelerator) driver component of Android devices that utilize Qualcomm Aerospace Foundation (CAF) based Linux kernels. This flaw affects all Android versions that incorporate CAF's kernel modifications, creating a widespread security concern across numerous mobile devices. The IPA driver serves as a crucial interface for image processing operations within the Android ecosystem, handling multimedia data processing tasks that are fundamental to device functionality. The buffer overflow vulnerability specifically manifests in the driver's handling of input data structures, where insufficient bounds checking allows maliciously crafted input to overwrite adjacent memory regions.
The technical exploitation of this vulnerability stems from improper memory management practices within the IPA driver implementation. When the driver processes image data or commands from user space applications, it fails to validate the size of incoming data buffers before copying them into fixed-size internal storage areas. This fundamental flaw creates a condition where an attacker can supply data exceeding the allocated buffer space, resulting in memory corruption that can be leveraged for arbitrary code execution. The vulnerability operates at the kernel level, meaning successful exploitation would grant attackers complete control over the device's operating system, bypassing standard security mechanisms and access controls that normally protect user data and system integrity.
The operational impact of CVE-2017-8236 extends beyond simple privilege escalation, as it represents a pathway for sophisticated attack vectors that can compromise entire device ecosystems. Attackers could potentially exploit this vulnerability through malicious applications, compromised multimedia files, or even through network-based attacks that manipulate image processing workflows. The implications are particularly severe given that the IPA driver handles sensitive multimedia operations, making it an attractive target for adversaries seeking to gain persistent access to mobile devices. This vulnerability directly aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of how kernel-level memory corruption can lead to complete system compromise. The attack surface is further expanded by the fact that this vulnerability affects multiple Android versions, creating a broad range of potential targets for exploitation.
Mitigation strategies for CVE-2017-8236 require immediate patching of affected kernel versions and implementation of runtime protections to prevent exploitation attempts. Device manufacturers should prioritize rolling out security updates that include proper bounds checking mechanisms within the IPA driver code, ensuring that all input data is validated before processing. System administrators and security teams should implement monitoring solutions that detect anomalous behavior patterns consistent with buffer overflow exploitation attempts, particularly around image processing operations. The vulnerability's classification as a kernel-level flaw necessitates comprehensive testing of patches to ensure they do not introduce regressions in device functionality, while also aligning with ATT&CK framework techniques related to privilege escalation and kernel exploitation. Organizations should also consider implementing application whitelisting policies and restricting access to potentially vulnerable image processing APIs until comprehensive security measures are in place.