"Several DoS, Code Execution Vulnerabilities Found in Rockwell Automation Controllers"
Organizations using controllers made by Rockwell Automation have been informed recently about several potentially serious vulnerabilities. Recently the US Cybersecurity and Infrastructure Security Agency (CISA) published three advisories to describe the four high-severity vulnerabilities found in the controllers. Rockwell Automation has also published individual advisories for each security hole. One flaw is CVE-2022-3156, which impacts the Studio 5000 Logix Emulate controller emulation software. The company noted that the vulnerability is caused by a misconfiguration that results in users being granted elevated permissions on certain product services. An attacker could exploit the weakness for remote code execution. The second vulnerability is CVE-2022-3157, which affects CompactLogix, GuardLogix (including Compact), and ControlLogix controllers. The company stated that an attacker can exploit the flaw to launch a denial-of-service (DoS) attack against a device by sending specially crafted CIP requests that cause a “major non-recoverable fault.” The remaining vulnerabilities impact MicroLogix 1100 and 1400 programmable logic controllers (PLCs). One of the security holes, CVE-2022-46670, is a stored cross-site scripting (XSS) issue in the embedded webserver that can be exploited for remote code execution without authentication. The researchers noted that the payload is transferred to the controller over SNMP and is rendered on the homepage of the embedded website. The second bug, CVE-2022-3166, is a clickjacking issue that can be exploited by an attacker with network access to the affected device to cause a DoS condition for the webserver application. The first two vulnerabilities have been patched with updates. For the last two issues, the company has made available mitigations that should prevent attacks. Rockwell says it’s not aware of any malicious attacks exploiting these vulnerabilities.