GHSA-W23Q-4HW3-2PP6
Vulnerability from github – Published: 2023-09-06 18:43 – Updated: 2023-09-06 18:43
VLAI
Summary
Minio vulnerable to Privilege Escalation on Windows via Path separator manipulation
Details
Impact
All users on Windows are impacted. MinIO fails to filter the \ character, which allows for arbitrary object placement across
buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to PutObject in a specific bucket, can create an admin user.
Patches
There are two patches that fix this problem comprehensively
commit b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc
Author: Harshavardhana <harsha@minio.io>
Date: Mon Mar 20 13:16:00 2023 -0700
reject object names with '\' on windows (#16856)
commit 8d6558b23649f613414c8527b58973fbdfa4d1b8
Author: Harshavardhana <harsha@minio.io>
Date: Mon Mar 20 00:35:25 2023 -0700
fix: convert '\' to '/' on windows (#16852)
Workarounds
There are no known workarounds
References
The vulnerable code:
// minio/cmd/generic-handlers.go
// Check if the incoming path has bad path components,
// such as ".." and "."
// SlashSeparator -> /
// dotdotComponent -> ..
// dotComponent -> .
func hasBadPathComponent(path string) bool {
path = strings.TrimSpace(path)
for _, p := range strings.Split(path, SlashSeparator) {
switch strings.TrimSpace(p) {
case dotdotComponent:
return true
case dotComponent:
return true
}
}
return false
}
Severity
8.8 (High)
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/minio/minio"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0.0-202303200735"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-28433"
],
"database_specific": {
"cwe_ids": [
"CWE-668"
],
"github_reviewed": true,
"github_reviewed_at": "2023-09-06T18:43:13Z",
"nvd_published_at": "2023-03-22T21:15:00Z",
"severity": "HIGH"
},
"details": "### Impact\nAll users on Windows are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across\nbuckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user.\n\n### Patches\nThere are two patches that fix this problem comprehensively\n\n```\ncommit b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate: Mon Mar 20 13:16:00 2023 -0700\n\n reject object names with \u0027\\\u0027 on windows (#16856)\n```\n\n```\ncommit 8d6558b23649f613414c8527b58973fbdfa4d1b8\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate: Mon Mar 20 00:35:25 2023 -0700\n\n fix: convert \u0027\\\u0027 to \u0027/\u0027 on windows (#16852)\n```\n\n### Workarounds\nThere are no known workarounds\n\n### References\nThe vulnerable code:\n```go\n// minio/cmd/generic-handlers.go\n// Check if the incoming path has bad path components,\n// such as \"..\" and \".\"\n// SlashSeparator -\u003e /\n// dotdotComponent -\u003e ..\n// dotComponent -\u003e .\nfunc hasBadPathComponent(path string) bool {\n path = strings.TrimSpace(path)\n for _, p := range strings.Split(path, SlashSeparator) {\n switch strings.TrimSpace(p) {\n case dotdotComponent:\n return true\n case dotComponent:\n return true\n }\n }\n return false\n}\n```\n",
"id": "GHSA-w23q-4hw3-2pp6",
"modified": "2023-09-06T18:43:13Z",
"published": "2023-09-06T18:43:13Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/minio/minio/security/advisories/GHSA-w23q-4hw3-2pp6"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28433"
},
{
"type": "WEB",
"url": "https://github.com/minio/minio/commit/8d6558b23649f613414c8527b58973fbdfa4d1b8"
},
{
"type": "WEB",
"url": "https://github.com/minio/minio/commit/b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc"
},
{
"type": "PACKAGE",
"url": "https://github.com/minio/minio"
},
{
"type": "WEB",
"url": "https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Minio vulnerable to Privilege Escalation on Windows via Path separator manipulation"
}
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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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