What is CVE-2021-20487?

CVE-2021-20487 is a critical-severity vulnerability in Ibm 8335-gth, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2021-05-26.

How severe is CVE-2021-20487?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Ibm 8335-gth

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.

EPSS: 0.007 (48.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ibm 8335-gth
Ibm 8335-gtx
Ibm 9008-22l
Ibm 9009-22a
Ibm 9009-22g
Ibm 9009-41a
Ibm 9009-41g
Ibm 9009-42a
Ibm 9009-42g
Ibm 9040-mr9

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

psirt@us.ibm.com (x_refsource_CONFIRM, Vendor Advisory)
psirt@us.ibm.com (VDB Entry, vdb-entry, Vendor Advisory, x_refsource_XF)

Frequently asked questions

What is CVE-2021-20487?: CVE-2021-20487 is a critical-severity vulnerability in Ibm 8335-gth, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2021-05-26.
How severe is CVE-2021-20487?: Critical severity. CVSS v3 base score is 9.1 out of 10.