CVE-2019-5229

Vulnerability

Huawei P30 smartphones running versions earlier than ELLE-AL00B 9.1.0.193(C00E190R2P1) contain an insufficient verification vulnerability. The system does not properly validate certain parameters, leaving a code path that can be abused by an attacker who has already gained high privilege on the device [1].

Exploitation

An attacker must first connect to the phone and obtain high privilege (e.g., root or system-level access). Once that level of access is achieved, the attacker can leverage the insufficient parameter verification to trigger malicious code execution. The exact sequence of steps is not detailed in the available reference, but the attack requires both physical or network connectivity and elevated privileges [1].

Impact

Successful exploitation allows the attacker to execute arbitrary malicious code on the device. Since the attacker already holds high privilege, the impact is a full compromise of the device's confidentiality, integrity, and availability, potentially leading to data theft, persistent backdoor installation, or device bricking [1].

Mitigation

Huawei has released a software update to fix this vulnerability. The resolved version is ELLE-AL00B 9.1.0.193(C00E190R2P1). Users are advised to update their devices to this version or later. No workarounds are provided in the advisory [1].