gsd-2021-20254
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-20254",
"description": "A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.",
"id": "GSD-2021-20254",
"references": [
"https://www.suse.com/security/cve/CVE-2021-20254.html",
"https://access.redhat.com/errata/RHSA-2021:4866",
"https://access.redhat.com/errata/RHSA-2021:4058",
"https://access.redhat.com/errata/RHSA-2021:3988",
"https://access.redhat.com/errata/RHSA-2021:3724",
"https://access.redhat.com/errata/RHSA-2021:3723",
"https://access.redhat.com/errata/RHSA-2021:2313",
"https://ubuntu.com/security/CVE-2021-20254",
"https://advisories.mageia.org/CVE-2021-20254.html",
"https://security.archlinux.org/CVE-2021-20254",
"https://alas.aws.amazon.com/cve/html/CVE-2021-20254.html",
"https://linux.oracle.com/cve/CVE-2021-20254.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"id": "GSD-2021-20254",
"modified": "2023-12-13T01:23:12.383968Z",
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"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "NONE",
"baseScore": 4.9,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 6.8,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 5.2
}
},
"lastModifiedDate": "2021-06-24T18:30Z",
"publishedDate": "2021-05-05T14:15Z"
}
}
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- 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.
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