CVE-2021-20487
CRITICALCVSS 9.1/10EPSS 0.68%
Last modified
CVE-2021-20487 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.68% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ibm | Power9 System Firmware | >= fw930.00, < fw930.30 |
| Ibm | Power9 System Firmware | >= fw940.00, < fw940.20 |
| Ibm | Power9 System Firmware | < fw950.00 |
| Ibm | Scale-Out Lc System Firmware | < op940.20 |
References
- https://exchange.xforce.ibmcloud.com/vulnerabilities/197730VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6455911Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/197730VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6455911Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20487?
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.
How severe is CVE-2021-20487?
CVE-2021-20487 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20487?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
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Are you affected by CVE-2021-20487?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST