GHSA-P6GG-5HF4-4RGJ
Vulnerability from github – Published: 2024-02-07 18:23 – Updated: 2024-02-07 20:24Summary
Arbitrary classes can be loaded and instantiated using a HTTP PUT request to the /api/system/cluster_config/ endpoint.
Details
Graylog's cluster config system uses fully qualified class names as config keys. To validate the existence of the requested class before using them, Graylog loads the class using the class loader.
https://github.com/Graylog2/graylog2-server/blob/e458db8bf4f789d4d19f1b37f0263f910c8d036c/graylog2-server/src/main/java/org/graylog2/rest/resources/system/ClusterConfigResource.java#L208-L214
PoC
A request of the following form will output the content of the /etc/passwd file:
curl -u admin:<admin-password> -X PUT http://localhost:9000/api/system/cluster_config/java.io.File \
-H "Content-Type: application/json" \
-H "X-Requested-By: poc" \
-d '"/etc/passwd"'
To perform the request, authorization is required. Only users posessing the clusterconfigentry:create and clusterconfigentry:edit permissions are allowed to do so. These permissions are usually only granted to Admin users.
Impact
If a user with the appropriate permissions performs the request, arbitrary classes with 1-arg String constructors can be instantiated.
This will execute arbitrary code that is run during class instantiation.
In the specific use case of java.io.File, the behaviour of the internal web-server stack will lead to information exposure by including the entire file content in the response to the REST request.
Credits
Analysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.graylog2:graylog2-server"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "5.1.11"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.graylog2:graylog2-server"
},
"ranges": [
{
"events": [
{
"introduced": "5.2.0-alpha.1"
},
{
"fixed": "5.2.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-24824"
],
"database_specific": {
"cwe_ids": [
"CWE-284"
],
"github_reviewed": true,
"github_reviewed_at": "2024-02-07T18:23:43Z",
"nvd_published_at": "2024-02-07T18:15:55Z",
"severity": "HIGH"
},
"details": "### Summary\n\nArbitrary classes can be loaded and instantiated using a HTTP PUT request to the `/api/system/cluster_config/` endpoint.\n\n### Details\n\nGraylog\u0027s cluster config system uses fully qualified class names as config keys. To validate the existence of the requested class before using them, Graylog loads the class using the class loader. \n\nhttps://github.com/Graylog2/graylog2-server/blob/e458db8bf4f789d4d19f1b37f0263f910c8d036c/graylog2-server/src/main/java/org/graylog2/rest/resources/system/ClusterConfigResource.java#L208-L214\n\n\n### PoC\nA request of the following form will output the content of the `/etc/passwd` file:\n\n```\ncurl -u admin:\u003cadmin-password\u003e -X PUT http://localhost:9000/api/system/cluster_config/java.io.File \\\n -H \"Content-Type: application/json\" \\\n -H \"X-Requested-By: poc\" \\\n -d \u0027\"/etc/passwd\"\u0027\n```\n\nTo perform the request, authorization is required. Only users posessing the `clusterconfigentry:create` and `clusterconfigentry:edit` permissions are allowed to do so. These permissions are usually only granted to `Admin` users.\n\n### Impact\n\nIf a user with the appropriate permissions performs the request, arbitrary classes with 1-arg String constructors can be instantiated. \n\nThis will execute arbitrary code that is run during class instantiation.\n\nIn the specific use case of `java.io.File`, the behaviour of the internal web-server stack will lead to information exposure by including the entire file content in the response to the REST request.\n\n### Credits\n\nAnalysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd",
"id": "GHSA-p6gg-5hf4-4rgj",
"modified": "2024-02-07T20:24:28Z",
"published": "2024-02-07T18:23:43Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-p6gg-5hf4-4rgj"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-24824"
},
{
"type": "WEB",
"url": "https://github.com/Graylog2/graylog2-server/commit/75ef2b8d60e7d67f859b79fe712c8ae7b2e861d8"
},
{
"type": "WEB",
"url": "https://github.com/Graylog2/graylog2-server/commit/7f8ef7fa8edf493106d5ef6f777d4da02c5194d9"
},
{
"type": "PACKAGE",
"url": "https://github.com/Graylog2/graylog2-server"
},
{
"type": "WEB",
"url": "https://github.com/Graylog2/graylog2-server/blob/e458db8bf4f789d4d19f1b37f0263f910c8d036c/graylog2-server/src/main/java/org/graylog2/rest/resources/system/ClusterConfigResource.java#L208-L214"
}
],
"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": "Graylog vulnerable to instantiation of arbitrary classes triggered by API request"
}
Sightings
| Author | Source | Type | Date |
|---|
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.