CVE-2021-3897 Auth bypass in Fan Power Controller2 (FPC2)
Unauthenticated attackers can bypass authentication in Lenovo FPC2 and SMM firmware to execute arbitrary commands on the management modules.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3897?
CVE-2021-3897 is a critical authentication bypass vulnerability in Lenovo Fan Power Controller2 (FPC2), published on 22 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An authentication bypass vulnerability was discovered in an internal service of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware during an that could allow an unauthenticated attacker to execute commands on the SMM and FPC2. SMM2 is not affected.
Weakness: CWE-288
Which versions are affected by CVE-2021-3897?
It affects 5 products.
Products include Ibm Nextscale Fan Power Controller Firmware, Lenovo Nextscale N1200 Enclosure Firmware, Lenovo Thinkagile Hx Enclosure Certified Node Firmware, Lenovo Thinkagile Vx Enclosure Firmware, Lenovo Thinksystem D2 Enclosure Firmware.
How do I fix CVE-2021-3897?
No fix has been published for CVE-2021-3897 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-3897 being exploited?
There is no known exploitation of CVE-2021-3897 in the wild and no public exploit code.
Other vulnerabilities in Lenovo Fan Power Controller2 (FPC2)
Sources
Also known as GHSA-hp9h-gmr9-r5h4.