CVE-2019-16863 — STMicroelectronics ST33TPHF2ESPI TPM devices before 2019-09-12 allow attackers t

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-11-14T02:07:52.000Z
• Last modified: 2024-08-05T01:24:48.370Z

09References

• tpm.fail — http://tpm.fail
• support.f5.com — https://support.f5.com/csp/article/K32412503?utm_source=f5support&amp%3Butm_medi…
• support.hpe.com — https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpe…
• support.lenovo.com — https://support.lenovo.com/us/en/product_security/LEN-29406
• www.st.com — https://www.st.com/content/st_com/en/campaigns/tpm-update.html
• portal.msrc.microsoft.com — https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024