CVE-2018-7939 Security feature bypass in G9 Lite, Honor 5A, Honor 6X, Honor 8

Medium 4.6 Published 12 Sep 2018 Updated 5 Aug 2024

Attackers can bypass Factory Reset Protection on Huawei smartphones by enabling TalkBack during setup, allowing unauthorized device access.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-7939?

CVE-2018-7939 is a medium-severity vulnerability in Huawei Technologies Co., Ltd. G9 Lite, Honor 5A, Honor 6X, Honor 8, published on 12 Sep 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Huawei smart phones G9 Lite, Honor 5A, Honor 6X, Honor 8 with the versions before VNS-L53C605B120CUSTC605D103, the versions before CAM-L03C605B143CUSTC605D008, the versions before CAM-L21C10B145, the versions before CAM-L21C185B156, the versions before CAM-L21C223B133, the versions before CAM-L21C432B210, the versions before CAM-L21C464B170, the versions before CAM-L21C636B245, the versions before Berlin-L21C10B372, the versions before Berlin-L21C185B363, the versions before Berlin-L21C464B137, the versions before Berlin-L23C605B161, the versions before FRD-L09C10B387, the versions before FRD-L09C185B387, the versions before FRD-L09C432B398, the versions before FRD-L09C636B387, the versions before FRD-L19C10B387, the versions before FRD-L19C432B399, the versions before FRD-L19C636B387 have a Factory Reset Protection (FRP) bypass security vulnerability. When re-configuring the mobile phone using the factory reset protection (FRP) function, an attacker can disable the boot wizard by enable the talkback function. As a result, the FRP function is bypassed.

Which versions are affected by CVE-2018-7939?

It affects 5 products.

Products include Huawei G9 Lite Firmware, Huawei Honor 5a, Huawei Honor 5a Firmware, Huawei Honor 6x Firmware, Huawei Honor 8 Firmware.

How do I fix CVE-2018-7939?

No fix has been published for CVE-2018-7939 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-7939 being exploited?

There is no known exploitation of CVE-2018-7939 in the wild and no public exploit code.

Sources

Also known as GHSA-6gm6-9xjg-j4p8.