Researcher published details about a backdoor mechanism he found in HiSilicon chips, but he did not report it to the vendor due to the lack of trust in it.
The Russian security expert Vladislav Yarmak has published technical details about a backdoor mechanism he discovered in HiSilicon chips.
The backdoor mechanism could allow attackers to gain root shell access and full control of device. The expert also published a Proof of concept code for the vulnerability.Entire news is here
source: securityaffairs.co