UBUNTU-CVE-2018-3968

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Source
https://ubuntu.com/security/CVE-2018-3968
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-3968.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-3968
Upstream
Withdrawn
2025-07-18T16:44:25Z
Published
2019-03-21T17:29:00Z
Modified
2025-07-16T07:38:40.720304Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 8.2 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • 7.0 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:18.04:LTS / u-boot

Package

Name
u-boot
Purl
pkg:deb/ubuntu/u-boot@2019.07+dfsg-1ubuntu4~18.04.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2019.07+dfsg-1ubuntu4~18.04.1

Affected versions

2016.*
2016.03+dfsg1-6ubuntu2
2018.*
2018.07~rc3+dfsg1-0ubuntu1~18.04.1
2018.07~rc3+dfsg1-0ubuntu2~18.04.1
2018.07~rc3+dfsg1-0ubuntu3~18.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "u-boot",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-amlogic",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-exynos",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-imx",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-omap",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-qcom",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-rockchip",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-rpi",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-sunxi",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-tegra",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        },
        {
            "binary_name": "u-boot-tools",
            "binary_version": "2019.07+dfsg-1ubuntu4~18.04.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-3968.json"