CVE-2018-13405 (GCVE-0-2018-13405)
Vulnerability from cvelistv5 – Published: 2018-07-06 14:00 – Updated: 2024-08-05 09:00
VLAI
EPSS
VEX
Summary
The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.
Severity
7.8 (High)
CWE
- n/a
Assigner
References
28 references
Date Public
2018-07-06 00:00
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"value": "The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID."
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{
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"value": "La funci\u00f3n inode_init_owner en fs/inode.c en el kernel de Linux hasta la versi\u00f3n 3.16 permite a los usuarios locales crear archivos con una propiedad de grupo no deseada, en un escenario donde un directorio es SGID a un cierto grupo y es escribible por un usuario que no es miembro de ese grupo. En este caso, el no miembro puede desencadenar la creaci\u00f3n de un archivo simple cuya propiedad de grupo sea ese grupo. El comportamiento previsto era que el no miembro puede activar la creaci\u00f3n de un directorio (pero no un archivo plano) cuya propiedad de grupo sea ese grupo. El no miembro puede aumentar sus privilegios haciendo el archivo plano ejecutable y el SGID"
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID."
},
{
"lang": "es",
"value": "La funci\u00f3n inode_init_owner en fs/inode.c en el kernel de Linux hasta la versi\u00f3n 3.16 permite a los usuarios locales crear archivos con una propiedad de grupo no deseada, en un escenario donde un directorio es SGID a un cierto grupo y es escribible por un usuario que no es miembro de ese grupo. En este caso, el no miembro puede desencadenar la creaci\u00f3n de un archivo simple cuya propiedad de grupo sea ese grupo. El comportamiento previsto era que el no miembro puede activar la creaci\u00f3n de un directorio (pero no un archivo plano) cuya propiedad de grupo sea ese grupo. El no miembro puede aumentar sus privilegios haciendo el archivo plano ejecutable y el SGID"
}
],
"id": "CVE-2018-13405",
"lastModified": "2024-11-21T03:47:02.490",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
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"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.6,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2018-07-06T14:29:01.223",
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],
"sourceIdentifier": "cve@mitre.org",
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"weaknesses": [
{
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{
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"value": "CWE-269"
}
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},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-06-28T11:09:08+00:00",
"cve": "CVE-2018-13405",
"id": "CVE-2018-13405",
"initial_release_date": "2018-07-05T00:00:00+00:00",
"product_status:fixed": "854",
"product_status:known_affected": "13",
"product_status:known_not_affected": "41",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-13405.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-05T16:52:29Z",
"cve": "CVE-2018-13405",
"id": "CVE-2018-13405",
"initial_release_date": "2023-02-15T04:26:01Z",
"product_status:known_affected": "402",
"product_status:known_not_affected": "83",
"product_status:recommended": "994",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2018-13405",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-13405.json",
"version": "53"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.