gsd-2020-27749
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-27749",
"description": "A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"id": "GSD-2020-27749",
"references": [
"https://www.suse.com/security/cve/CVE-2020-27749.html",
"https://www.debian.org/security/2021/dsa-4867",
"https://access.redhat.com/errata/RHSA-2021:3675",
"https://access.redhat.com/errata/RHSA-2021:2790",
"https://access.redhat.com/errata/RHSA-2021:2566",
"https://access.redhat.com/errata/RHSA-2021:1734",
"https://access.redhat.com/errata/RHSA-2021:0704",
"https://access.redhat.com/errata/RHSA-2021:0703",
"https://access.redhat.com/errata/RHSA-2021:0702",
"https://access.redhat.com/errata/RHSA-2021:0701",
"https://access.redhat.com/errata/RHSA-2021:0700",
"https://access.redhat.com/errata/RHSA-2021:0699",
"https://access.redhat.com/errata/RHSA-2021:0698",
"https://access.redhat.com/errata/RHSA-2021:0697",
"https://access.redhat.com/errata/RHSA-2021:0696",
"https://ubuntu.com/security/CVE-2020-27749",
"https://advisories.mageia.org/CVE-2020-27749.html",
"https://security.archlinux.org/CVE-2020-27749",
"https://linux.oracle.com/cve/CVE-2020-27749.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"id": "GSD-2020-27749",
"modified": "2023-12-13T01:22:11.416073Z",
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"baseScore": 7.2,
"confidentialityImpact": "COMPLETE",
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"vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
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"lastModifiedDate": "2022-05-13T20:51Z",
"publishedDate": "2021-03-03T17:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- 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.