What is CVE-2018-3968?

CVE-2018-3968 is a high-severity vulnerability in Denx U-Boot, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.0/10. Published 2019-03-21.

How severe is CVE-2018-3968?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Denx U-Boot

CVE-2018-3968

An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.

EPSS: 0.003 (19.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Denx U-boot — versions 2013.07, 2014.07
N/a Das U-boot — versions Das U-Boot 2013.07-rc1 to 2014.07-rc2 OCTEON-SDK 3.1.2 to 5.1 CUJO Smart Firewall - Firmware version 7003

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-3968?: CVE-2018-3968 is a high-severity vulnerability in Denx U-Boot, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.0/10. Published 2019-03-21.
How severe is CVE-2018-3968?: High severity. CVSS v3 base score is 7.0 out of 10.