What is the CVSS score of CVE-2019-16863?

CVE-2019-16863 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 3.3%.

St33Tphf2Espi Firmware CVE-2019-16863

MEDIUM

Observable Discrepancy (CWE-203)

2019-11-14 cve@mitre.org

Information Disclosure St33Tphf2Espi Firmware St33Tphf2Ei2C Firmware St33Tphf20Spi Firmware St33Tphf20I2C Firmware

5.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.9 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Nov 14, 2019 - 03:15 nvd

MEDIUM 5.9

DescriptionNVD

AnalysisAI

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. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-203. 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. Affected products include: St St33Tphf2Espi Firmware, St St33Tphf2Ei2C Firmware, St St33Tphf20Spi Firmware, St St33Tphf20I2C Firmware. Version information: before 2019.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.