CVE-2019-16863
MEDIUMCVSS 5.9/10EPSS 3.25%
Last modified
CVE-2019-16863 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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 estimates a 3.25% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| St | St33tphf2espi Firmware | 71.0 |
| St | St33tphf2espi Firmware | 71.4 |
| St | St33tphf2espi Firmware | 71.12 |
| St | St33tphf2espi Firmware | 73.0 |
| St | St33tphf2espi Firmware | 73.4 |
| St | St33tphf2espi Firmware | 73.8 |
| St | St33tphf2ei2c Firmware | 73.5 |
| St | St33tphf2ei2c Firmware | 73.9 |
| St | St33tphf20spi Firmware | 74.0 |
| St | St33tphf20spi Firmware | 74.4 |
| St | St33tphf20spi Firmware | 74.8 |
| St | St33tphf20spi Firmware | 74.16 |
| St | St33tphf20i2c Firmware | 74.5 |
| St | St33tphf20i2c Firmware | 74.9 |
References
- http://tpm.failThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024Third Party Advisory
- https://support.lenovo.com/us/en/product_security/LEN-29406Third Party Advisory
- http://tpm.failThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024Third Party Advisory
- https://support.lenovo.com/us/en/product_security/LEN-29406Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2019-16863?
CVE-2019-16863 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 3.25% probability of exploitation in the next 30 days.
How do I fix CVE-2019-16863?
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
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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