CVE-2021-35535 Insufficient Security Control Vulnerability
An attacker with network access can exploit a boot sequence gap to load an older OS version, causing a denial of service on Hitachi Energy Relion devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-35535?
CVE-2021-35535 is a high-severity vulnerability in Hitachi Energy Relion 670 Series, published on 18 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insecure Boot Image vulnerability in Hitachi Energy Relion Relion 670/650/SAM600-IO series allows an attacker who manages to get access to the front network port and to cause a reboot sequences of the device may exploit the vulnerability, where there is a tiny time gap during the booting process where an older version of VxWorks is loaded prior to application firmware booting, could exploit the vulnerability in the older version of VxWorks and cause a denial-of-service on the product. This issue affects: Hitachi Energy Relion 670 Series 2.2.2 all revisions; 2.2.3 versions prior to 2.2.3.3. Hitachi Energy Relion 670/650 Series 2.2.0 all revisions; 2.2.4 all revisions. Hitachi Energy Relion 670/650/SAM600-IO 2.2.1 all revisions.
Weakness: CWE-1188
Which versions are affected by CVE-2021-35535?
It affects 3 products.
Products include Hitachienergy Relion 650 Firmware, Hitachienergy Relion 670 Firmware, Hitachienergy Relion Sam600-Io Firmware.
How do I fix CVE-2021-35535?
No fix has been published for CVE-2021-35535 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-35535 being exploited?
There is no known exploitation of CVE-2021-35535 in the wild and no public exploit code.
Other vulnerabilities in Hitachi Energy Relion 670 Series
Sources
Also known as GHSA-v26g-w7c2-rjj3.