gsd-2020-15705
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-15705",
"description": "GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.",
"id": "GSD-2020-15705",
"references": [
"https://www.suse.com/security/cve/CVE-2020-15705.html",
"https://access.redhat.com/errata/RHSA-2020:3276",
"https://access.redhat.com/errata/RHSA-2020:3275",
"https://access.redhat.com/errata/RHSA-2020:3274",
"https://access.redhat.com/errata/RHSA-2020:3273",
"https://access.redhat.com/errata/RHSA-2020:3271",
"https://access.redhat.com/errata/RHSA-2020:3227",
"https://access.redhat.com/errata/RHSA-2020:3223",
"https://access.redhat.com/errata/RHSA-2020:3217",
"https://access.redhat.com/errata/RHSA-2020:3216",
"https://ubuntu.com/security/CVE-2020-15705",
"https://advisories.mageia.org/CVE-2020-15705.html",
"https://linux.oracle.com/cve/CVE-2020-15705.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"id": "GSD-2020-15705",
"modified": "2023-12-13T01:21:43.594208Z",
"schema_version": "1.4.0"
}
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"TITLE": "GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim"
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"affects": {
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"value": "Mathieu Trudel-Lapierre"
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"generator": {
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
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"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"authentication": "NONE",
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"vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
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"exploitabilityScore": 3.4,
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"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
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"scope": "UNCHANGED",
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},
"lastModifiedDate": "2022-04-18T15:22Z",
"publishedDate": "2020-07-29T18:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.