CVE-2021-20487 Security feature bypass in Power 9 Systems
Privileged users can bypass firmware signature verification to inject malicious code into IBM Power9 host firmware, compromising system integrity.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20487?
CVE-2021-20487 is a high-severity vulnerability in IBM Power 9 Systems, published on 26 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
IBM Power9 Self Boot Engine(SBE) could allow a privileged user to inject malicious code and compromise the integrity of the host firmware bypassing the host firmware signature verification process.
Weakness: CWE-347
Which versions are affected by CVE-2021-20487?
It affects 2 products.
Products include Ibm Power9 System Firmware, Ibm Scale-Out Lc System Firmware.
How do I fix CVE-2021-20487?
No fix has been published for CVE-2021-20487 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-20487 being exploited?
There is no known exploitation of CVE-2021-20487 in the wild and no public exploit code.
Sources
Also known as GHSA-gwjp-78rh-pcgc.