CVE-2020-9239 in Huawei
Summary
by MITRE
Huawei smartphones BLA-A09 versions 8.0.0.123(C212),versions earlier than 8.0.0.123(C567),versions earlier than 8.0.0.123(C797);BLA-TL00B versions earlier than 8.1.0.326(C01);Berkeley-L09 versions earlier than 8.0.0.163(C10),versions earlier than 8.0.0.163(C432),Versions earlier than 8.0.0.163(C636),Versions earlier than 8.0.0.172(C10);Duke-L09 versions Duke-L09C10B187, versions Duke-L09C432B189, versions Duke-L09C636B189;HUAWEI P20 versions earlier than 8.0.1.16(C00);HUAWEI P20 Pro versions earlier than 8.1.0.152(C00);Jimmy-AL00A versions earlier than Jimmy-AL00AC00B172;LON-L29D versions LON-L29DC721B192;NEO-AL00D versions earlier than 8.1.0.172(C786);Stanford-AL00 versions Stanford-AL00C00B123;Toronto-AL00 versions earlier than Toronto-AL00AC00B225;Toronto-AL00A versions earlier than Toronto-AL00AC00B225;Toronto-TL10 versions earlier than Toronto-TL10C01B225 have an information vulnerability. A module has a design error that is lack of control of input. Attackers can exploit this vulnerab
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Analysis
by VulDB Data Team • 09/11/2020
This vulnerability affects multiple Huawei smartphone models across various hardware platforms and software versions, representing a critical information disclosure flaw in the device's software architecture. The issue manifests as a design error in input validation mechanisms within a specific software module, creating an insufficient control over user-provided data. The vulnerability impacts devices running Android-based operating systems with Huawei's EMUI firmware, specifically those versions prior to the mentioned release numbers. According to the Common Weakness Enumeration framework, this vulnerability maps to CWE-20, which describes "Improper Input Validation" as a fundamental weakness that allows attackers to manipulate input data in ways that can lead to unauthorized access or information disclosure. The flaw exists in the core input processing logic where the system fails to properly validate or sanitize data before it is processed by the affected module.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with potential access to sensitive information stored on the device or transmitted through the affected software components. The lack of proper input control creates opportunities for malicious actors to exploit the weakness through various attack vectors, potentially leading to unauthorized data access, privilege escalation, or information leakage that could compromise user privacy and device security. Attackers could leverage this vulnerability through crafted inputs that bypass validation checks, potentially allowing them to access protected system resources or extract confidential data from the device's memory or storage systems. This type of vulnerability falls under the ATT&CK framework's technique T1059, which covers "Command and Scripting Interpreter" and T1074, "Data Staged," as attackers could use the information disclosure to gather intelligence about the device and its security posture for further exploitation.
The affected devices span across multiple Huawei product lines including the P20 series, Nova series, Mate series, and various other smartphone models with different hardware configurations and software versions. The vulnerability exists across different software version ranges, indicating that the design flaw was present in multiple iterations of the firmware before the specified patches were implemented. Security researchers have identified that this vulnerability could be exploited through various attack methods including but not limited to buffer overflow techniques, injection attacks, or manipulation of input parameters that would normally be validated by the system. The attack surface is particularly concerning as it affects devices that may be widely deployed in enterprise environments or used by individuals with access to sensitive information. The vulnerability's presence in multiple software versions suggests that Huawei may have implemented similar input validation mechanisms across different firmware components, creating a systemic issue that requires comprehensive remediation across all affected device models. Organizations should consider this vulnerability as part of their broader mobile security assessment and implement appropriate mitigation strategies including firmware updates, device monitoring, and user awareness training to prevent exploitation of this information disclosure weakness.