Code Injection in Hitachi Energy products - CVE-2021-35535
Published: December 3, 2021
Vulnerability identifier: #VU58505
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-35535
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists in the early boot process of the product in which there is a tiny time gap where a previous version of VxWorks is loaded prior to booting up the complete application firmware. A remote attacker can execute arbitrary code on the target device before the operating system is loaded.
Affected software
Relion 670 series
Relion 650 series
Relion SAM600-IO
Relion 650 series
Relion SAM600-IO
How to mitigate CVE-2021-35535
Install updates from vendor's website.
Relion 670 series - addressed in versions 2.2.3.4, 2.2.5
Relion 650 series - update to 2.2.5
Relion SAM600-IO - update to 2.2.5
Relion 650 series - update to 2.2.5
Relion SAM600-IO - update to 2.2.5