Vulnerability in St St33tphf20i2c

CVE-2019-16863

STMicroelectronics ST33TPHF2ESPI TPM devices before 2019-09-12 allow attackers to extract the ECDSA private key via a side-channel timing attack because ECDSA scalar multiplication is mishandled, aka TPM-FAIL.

EPSS: 0.033 (87.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-16863?
CVE-2019-16863 is a medium-severity vulnerability in St St33tphf20i2c, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2019-11-14.
How severe is CVE-2019-16863?
Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2019-16863 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.