gsd-2021-20233
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-20233",
"description": "A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"id": "GSD-2021-20233",
"references": [
"https://www.suse.com/security/cve/CVE-2021-20233.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-2021-20233",
"https://advisories.mageia.org/CVE-2021-20233.html",
"https://security.archlinux.org/CVE-2021-20233",
"https://linux.oracle.com/cve/CVE-2021-20233.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"modified": "2023-12-13T01:23:12.082219Z",
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"baseScore": 7.2,
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"vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
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"lastModifiedDate": "2022-04-18T19:27Z",
"publishedDate": "2021-03-03T17:15Z"
}
}
}
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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.