CVE-2017-2721 Auth bypass in Berlin-L21,Berlin-L21HN,Berlin-L22,Berlin-L22HN,Berlin-L23,Berlin-L24HN,FRD-L02,FRD-L04,FRD-L09,FRD-L14,FRD-L19,
Attackers can bypass Factory Reset Protection on Huawei smartphones via Swype Keyboard to update the Google account and gain unauthorized 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-2017-2721?
CVE-2017-2721 is a medium-severity authentication bypass vulnerability in Huawei Technologies Co., Ltd. Berlin-L21,Berlin-L21HN,Berlin-L22,Berlin-L22HN,Berlin-L23,Berlin-L24HN,FRD-L02,FRD-L04,FRD-L09,FRD-L14,FRD-L19,, published on 22 Nov 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Some Huawei smart phones with software Berlin-L21C10B130,Berlin-L21C185B133,Berlin-L21HNC10B131,Berlin-L21HNC185B140,Berlin-L21HNC432B151,Berlin-L22C636B160,Berlin-L22HNC636B130,Berlin-L22HNC675B150CUSTC675D001,Berlin-L23C605B131,Berlin-L24HNC567B110,FRD-L02C432B120,FRD-L02C635B130,FRD-L02C675B170CUSTC675D001,FRD-L04C567B162,FRD-L04C605B131,FRD-L09C10B130,FRD-L09C185B130,FRD-L09C432B131,FRD-L09C636B130,FRD-L14C567B162,FRD-L19C10B130,FRD-L19C432B131,FRD-L19C636B130 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 login the configuration flow by Swype Keyboard and can perform some operations to update the Google account. As a result, the FRP function is bypassed.
Weakness: CWE-287
Which versions are affected by CVE-2017-2721?
It affects 11 products.
Products include Huawei Berlin-L21 Firmware, Huawei Berlin-L21hn Firmware, Huawei Berlin-L22 Firmware, Huawei Berlin-L22hn Firmware, Huawei Berlin-L23 Firmware, Huawei Berlin-L24hn Firmware and 5 more.
How do I fix CVE-2017-2721?
No fix has been published for CVE-2017-2721 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-2721 being exploited?
There is no known exploitation of CVE-2017-2721 in the wild and no public exploit code.
Sources
Also known as GHSA-26ch-2fxx-xjff.