CVE-2021-30465 (GCVE-0-2021-30465)
Vulnerability from cvelistv5 – Published: 2021-05-27 00:00 – Updated: 2024-08-03 22:32
VLAI
EPSS
VEX
Summary
runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.
Severity
8.5 (High)
CWE
- n/a
Assigner
References
10 references
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"matchCriteriaId": "151570F5-F04B-4F31-AE6E-F364FC8AC01C",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition."
},
{
"lang": "es",
"value": "runc versiones anteriores a 1.0.0-rc95, permite un Container Filesystem Breakout por medio de un Salto de Directorio.\u0026#xa0;Para explotar la vulnerabilidad, un atacante debe ser capaz de crear varios contenedores con una configuraci\u00f3n de montaje bastante espec\u00edfica.\u0026#xa0;El problema ocurre por medio de un ataque de intercambio de enlaces simb\u00f3licos que se basa en una condici\u00f3n de carrera"
}
],
"id": "CVE-2021-30465",
"lastModified": "2024-11-21T06:03:58.593",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.0,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 6.8,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 6.0,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-05-27T13:15:08.077",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
},
{
"source": "cve@mitre.org",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
},
{
"source": "cve@mitre.org",
"tags": [
"Issue Tracking"
],
"url": "https://bugzilla.opensuse.org/show_bug.cgi?id=1185405"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "https://github.com/opencontainers/runc/releases"
},
{
"source": "cve@mitre.org",
"tags": [
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"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r"
},
{
"source": "cve@mitre.org",
"url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html"
},
{
"source": "cve@mitre.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/"
},
{
"source": "cve@mitre.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "https://security.gentoo.org/glsa/202107-26"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20210708-0003/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2021/05/19/2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking"
],
"url": "https://bugzilla.opensuse.org/show_bug.cgi?id=1185405"
},
{
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"tags": [
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],
"url": "https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f"
},
{
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"tags": [
"Release Notes",
"Third Party Advisory"
],
"url": "https://github.com/opencontainers/runc/releases"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://security.gentoo.org/glsa/202107-26"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20210708-0003/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-11T14:28:37+00:00",
"cve": "CVE-2021-30465",
"id": "CVE-2021-30465",
"initial_release_date": "2021-05-19T10:00:00+00:00",
"product_status:fixed": "1188",
"product_status:known_affected": "2",
"product_status:known_not_affected": "95",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "runc: vulnerable to symlink exchange attack",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-30465.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-15T02:32:07Z",
"cve": "CVE-2021-30465",
"id": "CVE-2021-30465",
"initial_release_date": "2023-02-15T03:42:26Z",
"product_status:known_affected": "311",
"product_status:known_not_affected": "42",
"product_status:recommended": "423",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-30465",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-30465.json",
"version": "51"
}
}
}
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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.
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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.
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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.
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