CVE-2021-3155 (GCVE-0-2021-3155)
Vulnerability from cvelistv5 – Published: 2022-02-17 22:15 – Updated: 2024-08-03 16:45
VLAI
EPSS
VEX
Title
snapd created ~/snap with too-wide permissions
Summary
snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
Severity
CWE
- CWE-276 - Incorrect Default Permissions
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/notices/USN-5292-1 | x_refsource_MISC |
| https://github.com/snapcore/snapd/commit/6bcaeecc… | x_refsource_MISC |
| https://github.com/snapcore/snapd/commit/7d2a9666… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Canonical Ltd. | snapd |
Affected:
unspecified , ≤ 2.54.2
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T16:45:51.372Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://ubuntu.com/security/notices/USN-5292-1"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "snapd",
"vendor": "Canonical Ltd.",
"versions": [
{
"lessThanOrEqual": "2.54.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "James Troup"
}
],
"descriptions": [
{
"lang": "en",
"value": "snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1"
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.8,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-276",
"description": "CWE-276 Incorrect Default Permissions",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-02-17T22:15:16.000Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://ubuntu.com/security/notices/USN-5292-1"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
}
],
"source": {
"discovery": "USER"
},
"title": "snapd created ~/snap with too-wide permissions",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@ubuntu.com",
"ID": "CVE-2021-3155",
"STATE": "PUBLIC",
"TITLE": "snapd created ~/snap with too-wide permissions"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "snapd",
"version": {
"version_data": [
{
"version_affected": "\u003c=",
"version_value": "2.54.2"
}
]
}
}
]
},
"vendor_name": "Canonical Ltd."
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "James Troup"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1"
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.8,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-276 Incorrect Default Permissions"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://ubuntu.com/security/notices/USN-5292-1",
"refsource": "MISC",
"url": "https://ubuntu.com/security/notices/USN-5292-1"
},
{
"name": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85",
"refsource": "MISC",
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"name": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca",
"refsource": "MISC",
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
}
]
},
"source": {
"discovery": "USER"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2021-3155",
"datePublished": "2022-02-17T22:15:16.000Z",
"dateReserved": "2021-01-15T00:00:00.000Z",
"dateUpdated": "2024-08-03T16:45:51.372Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-3155",
"date": "2026-09-27",
"epss": "0.0026",
"percentile": "0.15951"
},
"fkie_nvd": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*",
"matchCriteriaId": "92201D07-90D7-445F-B474-85BFE8C31AAA",
"versionEndExcluding": "2.54.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
"matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*",
"matchCriteriaId": "AAE4D2D0-CEEB-416F-8BC5-A7987DF56190",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1"
},
{
"lang": "es",
"value": "snapd versiones 2.54.2 y anteriores, creaban directorios ~/snap en los directorios personales de usuarios sin especificar los permisos de s\u00f3lo propietario. Esto pod\u00eda permitir a un atacante local leer informaci\u00f3n que deber\u00eda ser privada. Corregido en snapd versiones 2.54.3+18.04, 2.54.3+20.04 y 2.54.3+21.10.1"
}
],
"id": "CVE-2021-3155",
"lastModified": "2024-11-21T06:21:00.923",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "LOW",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 2.1,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.8,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.0,
"impactScore": 1.4,
"source": "security@ubuntu.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-02-17T23:15:07.337",
"references": [
{
"source": "security@ubuntu.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"source": "security@ubuntu.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
},
{
"source": "security@ubuntu.com",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://ubuntu.com/security/notices/USN-5292-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://ubuntu.com/security/notices/USN-5292-1"
}
],
"sourceIdentifier": "security@ubuntu.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "security@ubuntu.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*",
"matchCriteriaId": "92201D07-90D7-445F-B474-85BFE8C31AAA",
"versionEndExcluding": "2.54.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
"matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*",
"matchCriteriaId": "AAE4D2D0-CEEB-416F-8BC5-A7987DF56190",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1"
},
{
"lang": "es",
"value": "snapd versiones 2.54.2 y anteriores, creaban directorios ~/snap en los directorios personales de usuarios sin especificar los permisos de s\u00f3lo propietario. Esto pod\u00eda permitir a un atacante local leer informaci\u00f3n que deber\u00eda ser privada. Corregido en snapd versiones 2.54.3+18.04, 2.54.3+20.04 y 2.54.3+21.10.1"
}
],
"id": "CVE-2021-3155",
"lastModified": "2024-11-21T06:21:00.923",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "LOW",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 2.1,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.8,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.0,
"impactScore": 1.4,
"source": "security@ubuntu.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-02-17T23:15:07.337",
"references": [
{
"source": "security@ubuntu.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"source": "security@ubuntu.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
},
{
"source": "security@ubuntu.com",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://ubuntu.com/security/notices/USN-5292-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://ubuntu.com/security/notices/USN-5292-1"
}
],
"sourceIdentifier": "security@ubuntu.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "security@ubuntu.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T05:13:36+00:00",
"cve": "CVE-2021-3155",
"id": "CVE-2021-3155",
"initial_release_date": "2021-01-05T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "snapd: lax permissions of ~/snap directories in user home",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3155.json",
"version": "3"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…