Vulnerability Details : 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.
Exploit prediction scoring system (EPSS) score for CVE-2018-3968
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2018-3968
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
4.4
|
MEDIUM | AV:L/AC:M/Au:N/C:P/I:P/A:P |
3.4
|
6.4
|
NIST |
|
8.2
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
1.5
|
6.0
|
Talos |
|
7.0
|
HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.0
|
5.9
|
NIST |
CWE ids for CVE-2018-3968
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-3968
-
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633
TALOS-2018-0633 || Cisco Talos Intelligence Group - Comprehensive Threat IntelligenceExploit;Third Party Advisory
Products affected by CVE-2018-3968
- cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*
- cpe:2.3:a:denx:u-boot:2014.07:rc1:*:*:*:*:*:*
- cpe:2.3:a:denx:u-boot:2013.07:rc1:*:*:*:*:*:*
- cpe:2.3:a:denx:u-boot:2013.07:rc2:*:*:*:*:*:*
- cpe:2.3:a:denx:u-boot:2013.07:rc3:*:*:*:*:*:*
- cpe:2.3:a:denx:u-boot:2014.07:rc2:*:*:*:*:*:*