ghsa-p6gg-5hf4-4rgj
Vulnerability from github
Summary
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 seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.