Auth bypass in Nxp Kinetis K8x
CVE-2019-14239
On NXP Kinetis KV1x, Kinetis KV3x, and Kinetis K8x devices, Flash Access Controls (FAC) (a software IP protection method for execute-only access) can be defeated by leveraging a load instruction inside the execute-only region to expose the protected code into a CPU register.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.usenix.org/system/files/woot19-paper_schink.pdf (Exploit, Third Party Advisory, Mitigation)
- www.usenix.org/conference/woot19/presentation/schink (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-14239?
- CVE-2019-14239 is a medium-severity vulnerability in Nxp Kinetis K8x, classified under Improper Authentication. CVSS score: 6.6/10. Published 2019-09-24.
- How severe is CVE-2019-14239?
- Medium severity. CVSS v3 base score is 6.6 out of 10.