According to the security company Sonicall, hackers are looking at Internet vulnerable systems access control into a smart door-buildings, in order to violate them and to accomplish them attacks DDoS.
The attackers are targeting the Linear eMerge E3, a product of Nortek Security & Control (NSC), which is a global leader in smart Appliances.
Linear eMerge E3 devices belong to the category of control systems access (access control). Usually used in corporate offices, factories, or industrial parks. They essentially control which doors and rooms / spaces employees and visitors / customers can access based on credentials (passwords) or smart cards their.
According to the researchers, the company had been informed of the vulnerabilities, and despite the fact that six out of ten were extremely serious, the NSC not released patches.
A few months later, Applied Risk published proof-of-concept exploit code.
Exploit CVE-2019-7256 vulnerability for DDoS attacks
Now, SonicWall researchers have published a report that some say hackers scan the internet to detect and breach vulnerable NSC Linear eMerge E3 devices, taking advantage of one of those ten vulnerabilities.
The vulnerability they use is CVE-2019-7256. it is about a "Command injection" vulnerability and is one of the most serious, found on devices. It can be used remotely even by hackers with little technical knowledge to carry out DDoS and other attacks.
According to SonicWall, attackers are able to execute arbitrary commands with administrative privileges. "An unauthorized, remote intruder can exploit the vulnerability to execute commands through a corrupted HTTP request," said researchers.
Hackers are using CVE-2019-7256 to take control of the devices, install malicious software and then carry out DDoS attacks on other targets.
The first of these attacks began on January 9 and was identified by Bad Packets researchers. According to company, there have been many more attacks since then.
“The attackers seem to be constantly targeting these devices as we watch ten thousand hits every day, ”SonicWall said. The attacks are carried out in 100 countries, but the main target is USA.
So far only 2,375 vulnerable devices have been detected. This number is very small compared to the millions of home routers and cameras security, which are also available online. However, the attackers continue scanning.
The devices IoTs are used as systems entry points
Vulnerable smart access control systems can be used as entry points to an organization's internal networks.
System administrators who manage networks with NSC Linear eMerge E3 devices installed disconnect systems from the Internet or at least to restrict access on these devices using one firewall or one VPN.