CVE-2020-9144 in Huawei
Summary
by MITRE • 01/14/2021
There is a heap overflow vulnerability in some Huawei smartphone, attackers can exploit this vulnerability to cause heap overflows due to improper restriction of operations within the bounds of a memory buffer.
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Analysis
by VulDB Data Team • 02/13/2021
The heap overflow vulnerability identified as CVE-2020-9144 affects Huawei smartphones and represents a critical memory safety issue that stems from inadequate bounds checking within memory buffer operations. This vulnerability resides in the smartphone's operating system or firmware components where insufficient validation allows malicious actors to manipulate heap memory allocation patterns. The flaw specifically manifests when the system processes data that exceeds predetermined buffer limits, creating conditions where adjacent memory locations can be overwritten or corrupted. Such memory corruption typically occurs during routine operations involving data processing, network communication, or multimedia handling within the device's software stack. The vulnerability's classification aligns with CWE-121 which describes heap-based buffer overflow conditions where insufficient bounds checking permits memory access beyond allocated buffer boundaries. This type of vulnerability directly impacts the device's memory management subsystem and can potentially affect multiple application layers depending on how the vulnerable code is integrated within the system architecture.
The operational impact of CVE-2020-9144 extends beyond simple system instability to encompass potential remote code execution capabilities that attackers can leverage for unauthorized access. When exploited successfully, the heap overflow allows adversaries to manipulate memory contents in ways that can lead to arbitrary code execution, privilege escalation, or complete system compromise. Attackers typically exploit this vulnerability by crafting malicious inputs that trigger the buffer overflow condition, potentially through specially formatted network packets, malicious media files, or compromised applications. The vulnerability's exploitation requires minimal user interaction in many scenarios, making it particularly dangerous as it can be triggered automatically during normal device operation. The heap memory corruption can result in application crashes, system hangs, or more severe consequences including persistent backdoor installation. This vulnerability directly maps to ATT&CK technique T1059 which describes execution through command and scripting interpreter, as successful exploitation often enables attackers to execute malicious code within the device's operational environment.
Mitigation strategies for CVE-2020-9144 should focus on immediate firmware updates provided by Huawei to address the underlying memory handling flaws. Device users must ensure their smartphones receive security patches promptly, as these updates typically include enhanced bounds checking mechanisms and memory allocation safeguards. Network administrators should implement monitoring solutions to detect potential exploitation attempts through unusual memory allocation patterns or network traffic anomalies. The vulnerability's remediation requires comprehensive code review and memory safety improvements including implementation of stack canaries, address space layout randomization, and improved input validation controls. Organizations should also consider network segmentation and access controls to limit potential lateral movement if exploitation occurs. Security teams should monitor for indicators of compromise related to heap memory anomalies and implement regular vulnerability assessments to identify similar memory safety issues within the device ecosystem. The remediation process must include thorough testing to ensure that the patches do not introduce compatibility issues with existing applications or device functionality while effectively addressing the heap overflow conditions that make the vulnerability exploitable.