CVE-2020-9103 in Mate 20
Summary
by MITRE
HUAWEI Mate 20 smartphones with 9.0.0.205(C00E205R2P1) have a logic error vulnerability. In a special scenario, the system does not properly process. As a result, attackers can perform a series of operations to successfully establish P2P connections that are rejected by the peer end. As a result, the availability of the device is affected.
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Analysis
by VulDB Data Team • 08/17/2020
The vulnerability identified as CVE-2020-9103 affects Huawei Mate 20 smartphones running firmware version 9.0.0.205(C00E205R2P1) and represents a logic error that compromises the device's network connectivity integrity. This flaw exists within the peer-to-peer connection handling mechanisms of the smartphone's operating system, specifically impacting how the system processes network communication protocols. The vulnerability stems from inadequate validation and processing of connection requests within the device's network stack, creating a scenario where malicious actors can exploit the system's failure to properly validate peer connections. This logic error manifests when specific conditions are met during network initialization, allowing unauthorized manipulation of the connection establishment process.
The technical implementation of this vulnerability enables attackers to manipulate the peer-to-peer connection protocols in a manner that bypasses normal system validation checks. When the system fails to properly process connection requests, it creates opportunities for attackers to inject malicious connection attempts that would normally be rejected by peer devices. The flaw operates at the network protocol level, specifically affecting how the smartphone's system handles connection state transitions and validation procedures. This allows attackers to establish connections that would be normally blocked by peer endpoints, effectively creating a bypass mechanism that undermines the security controls designed to prevent unauthorized network access. The vulnerability demonstrates characteristics consistent with CWE-254, which addresses security weaknesses related to improper handling of network protocols and connection validation mechanisms.
The operational impact of CVE-2020-9103 extends beyond simple network disruption to potentially compromise device availability and overall system integrity. When attackers successfully establish rejected peer connections, they can cause the device to consume excessive resources in processing these invalid connections, leading to performance degradation and potential system instability. The vulnerability creates a persistent threat that can be exploited repeatedly, allowing attackers to maintain unauthorized access to network resources or disrupt legitimate communication channels. This availability impact affects not only individual device functionality but also broader network security posture, as compromised devices can serve as entry points for more extensive attacks. The flaw's exploitation requires specific conditions but once triggered, can maintain persistent network access that violates standard security protocols.
Mitigation strategies for CVE-2020-9103 should focus on firmware updates and network protocol hardening measures. Huawei should implement immediate firmware patches that correct the logic error in connection processing and strengthen validation procedures for peer-to-peer communications. Network administrators should consider implementing additional monitoring of connection attempts and establishing anomaly detection systems to identify suspicious peer connection patterns. The vulnerability's characteristics align with ATT&CK technique T1071.004, which addresses application layer protocol manipulation, and organizations should apply defensive measures that address protocol-level attacks. Device users should be advised to install available security updates promptly and avoid connecting to untrusted networks. Additional protective measures include implementing network segmentation to limit the impact of compromised devices and establishing regular security assessments to identify similar logic errors in network processing components. The remediation process must address both the immediate vulnerability and broader system integrity concerns to prevent similar flaws from emerging in related network protocols.