Hackers are actively targeting a vulnerability in Linear eMerge E3 access controllers to infect the devices with malware and abuse them to launch distributed denial-of-service (DDoS) attacks, SonicWall revealed over the weekend.
A Nortek Security and Control LLC product, the Linear eMerge E3 access controller is used in the commercial, industrial, banking, medical, retail, and hospitality sectors to manage user access to specific facilities or areas.
In April last year, Gjoko Krstic, a researcher at industrial cybersecurity firm Applied Risk, presented at SecurityWeek’s ICS Cyber Security Conference in Singapore information on vulnerabilities found in building management and access control systems from various vendors, including Nortek.
Out of more than 100 vulnerabilities Krstic found in the analyzed systems during a year-long investigation, 10 were impacting Nortek’s Linear eMerge E3 product, and six of them were considered critical.
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Now, nearly one year later, SonicWall says it is seeing tens of thousands of daily attempts to exploit one of the critical vulnerabilities Applied Risk discovered in the eMerge E3 access controllers.
Tracked as CVE-2019-7256, the flaw is a command injection vulnerability that results from the insufficient sanitization of user-supplied input to a PHP function. The issue can be exploited to achieve arbitrary command execution with root privileges.
“The application constructs an OS command using externally-influenced input from an upstream component, but incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a dow ..
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