CVE-2021-22438

Vulnerability

CVE-2021-22438 is a memory buffer improper operation limit vulnerability in Huawei smartphones. The flaw resides in the memory buffer handling of certain Huawei devices and can be triggered by specially crafted input. Affected versions include EMUI 11.0.0 and Magic UI 4.0.0 [1].

Exploitation

An attacker can exploit this vulnerability by sending a crafted packet or file to the target device. No authentication is required, but the attacker must be able to deliver the malicious input to the vulnerable component. The exploitation does not require user interaction beyond the normal receipt of the crafted data [1].

Impact

Successful exploitation of this vulnerability may allow an attacker to execute arbitrary code on the affected device, leading to full compromise of the system. The impact includes potential information disclosure, data tampering, or denial of service, depending on the attacker's goals. The vulnerability is rated with a medium severity score [1].

Mitigation

Huawei has addressed this vulnerability in the June 2021 security update. Users are strongly advised to update their devices to the latest firmware version. For devices on EMUI 11.0.0 or Magic UI 4.0.0, applying the June 2021 patch is necessary [1]. No workarounds have been provided by the vendor.