CVE-2017-8243 in Android
Summary
by MITRE
A buffer overflow can occur when processing a firmware image file in all Qualcomm products with Android releases from CAF using the Linux kernel.
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Analysis
by VulDB Data Team • 11/07/2019
The vulnerability identified as CVE-2017-8243 represents a critical buffer overflow condition that affects Qualcomm products utilizing Android-based systems with Linux kernel implementations. This flaw manifests during the processing of firmware image files, creating an exploitable condition that can be leveraged by malicious actors to compromise system integrity. The vulnerability impacts all Qualcomm products that incorporate Android releases from the Code Aurora Forum (CAF) environment, making it particularly widespread across various mobile devices and embedded systems that rely on Qualcomm's hardware platforms.
The technical nature of this buffer overflow stems from inadequate input validation and memory management within the firmware processing components of Qualcomm's Linux kernel implementations. When firmware image files are processed, the system fails to properly validate the size or structure of incoming data, allowing attackers to craft malicious firmware images that exceed allocated buffer boundaries. This condition falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflow vulnerabilities, and can also be classified under CWE-787, representing out-of-bounds write conditions that occur when data is written beyond the boundaries of a buffer. The vulnerability demonstrates characteristics consistent with the ATT&CK framework's technique T1059.005, which involves the execution of malicious code through firmware manipulation and system-level exploitation.
The operational impact of CVE-2017-8243 extends beyond simple system instability, as it creates potential pathways for full system compromise and persistent access to affected devices. Attackers exploiting this vulnerability could gain unauthorized code execution privileges, potentially leading to complete device takeover, data exfiltration, or the installation of persistent backdoors. The nature of firmware-level exploitation means that traditional operating system security measures may be bypassed, as the vulnerability operates at a lower system level where many security controls are ineffective. This makes the vulnerability particularly dangerous in environments where mobile devices serve as primary access points to corporate networks or handle sensitive information, as it could enable attackers to establish long-term presence within target networks.
Mitigation strategies for CVE-2017-8243 require a multi-layered approach addressing both immediate system hardening and long-term architectural improvements. Organizations should prioritize the deployment of firmware updates from Qualcomm and device manufacturers as soon as available, as these patches typically address the underlying buffer overflow conditions through proper input validation and memory boundary checks. System administrators should implement firmware integrity verification mechanisms and establish secure boot processes that can detect and prevent unauthorized firmware modifications. Additionally, network monitoring solutions should be configured to identify anomalous firmware update activities or suspicious network traffic patterns that might indicate exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches and implementing robust firmware security practices, as outlined in industry standards such as NIST SP 800-144 and ISO/IEC 27031, which emphasize the critical need for secure firmware development and deployment practices to prevent such low-level system compromises.