The U.S. Cybersecurity and Infrastructure Security Company (CISA) has warned of critical security shortcomings in GE’s Common Relay (UR) family of ability management gadgets.
“Thriving exploitation of these vulnerabilities could enable an attacker to entry sensitive info, reboot the UR, attain privileged entry, or cause a denial-of-company ailment,” the agency reported in an advisory released on March 16.
GE’s common relays enable integrated monitoring and metering, significant-speed communications, and present simplified energy management for the safety of critical belongings.
The flaws, which impact a quantity of UR sophisticated defense and management relays, which include B30, B90, C30, C60, C70, C95, D30, D60, F35, F60, G30, G60, L30, L60, L90, M60, N60, T35 and T60, had been tackled by GE with the release of an up to date variation of the UR firmware (model 8.10) made accessible on December 24, 2020.
The patches take care of a complete of 9 vulnerabilities, the most essential of which worries an insecure default variable initialization, referring to the initialization of an inner variable in the software package with an insecure worth. The vulnerability (CVE-2021-27426) is also rated 9.8 out of 10, creating it a critical issue.
“By sending a specially crafted request, an attacker could exploit this vulnerability to bypass entry limits,” IBM pointed out in its alert.A second severe vulnerability relates to unused difficult-coded credentials in the bootloader binary (CVE-2021-27430, CVSS score 8.4), which could be exploited by an attacker “with physical obtain to the UR [Intelligent Electronic Device] can interrupt the boot sequence by rebooting the UR.”
Also preset by GE is a different substantial severity flaw (CVE-2021-27428, CVSS score 7.5) that could allow an unauthorized user to enhance firmware without having appropriate privileges.4 other vulnerabilities contain two incorrect input validations (CVE-2021-27418, CVE-2021-27420) and two flaws relating to exposure of sensitive info to unauthorized functions (CVE-2021-27422, CVE-2021-27424), therefore exposing the machine to cross-web page scripting attacks, allowing an attacker to accessibility critical information and facts without authentication, and even render the webserver unresponsive.
Last of all, all variations of UR firmware prior to 8.1x were found to use weak encryption and MAC algorithms for SSH interaction, building them more susceptible to brute-force attacks.
“CISA recommends people get defensive actions to limit the risk of exploitation of these vulnerabilities,” the agency said. “Limit network exposure for all command system units and/or units and ensure that they are not available from the Internet, [and] track down command system networks and distant units driving firewalls and isolate them from the business network.”
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