8.2

CVE-2018-3968: denx u-boot

Modified
AliasesUBUNTU-CVE-2018-3968DEBIAN-CVE-2018-3968
Published 21-03-2019Last modified 05-08-2024

Vulnerability summary

CVE-2018-3968 is a high (CVSS 8.2) vulnerability in denx u-boot. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v3.0 (CVE.org)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Timeline

  1. 21-03-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 4 sources · 3 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.28% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (talosintelligence.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • u-boot< 2014.07+dfsg1-1
Denx1 product
  • u-boot≥ 2013.07, ≤ 2014.07 | 2013.07:rc1 | 2013.07:rc2 | 2013.07:rc3 | 2014.07:rc1 | 2014.07:rc2
Ubuntu1 product
  • u-boot< 2019.07+dfsg-1ubuntu4~18.04.1

3 vendors · 3 products

References

4 links