Graylog vulnerable to instantiation of arbitrary classes triggered by API request
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.
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
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Java / Kotlin (Maven) | org.graylog2:graylog2-server | >= 2.0.0, < 5.1.11, >= 5.2.0-alpha.1, < 5.2.4 | 5.1.11, 5.2.4 |
Referencias
- https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-p6gg-5hf4-4rgj
- https://nvd.nist.gov/vuln/detail/CVE-2024-24824
- https://github.com/Graylog2/graylog2-server/commit/75ef2b8d60e7d67f859b79fe712c8ae7b2e861d8
- https://github.com/Graylog2/graylog2-server/commit/7f8ef7fa8edf493106d5ef6f777d4da02c5194d9
- https://github.com/Graylog2/graylog2-server
- https://github.com/Graylog2/graylog2-server/blob/e458db8bf4f789d4d19f1b37f0263f910c8d036c/graylog2-server/src/main/java/org/graylog2/rest/resources/system/ClusterConfigResource.java#L208-L214
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-284- Plataforma
- Java / Kotlin (Maven)
- Paquete
org.graylog2:graylog2-server- Publicada
- 07.02.2024
- Actualizado
- 11.10.2026 13:20
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-p6gg-5hf4-4rgj - CC BY 4.0
Historial de vulnerabilidades: org.graylog2:graylog2-server
Todas las vulnerabilidades publicadas de este paquete (Java / Kotlin (Maven)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 16
- Primera → última
- 05.2022 09.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 5
- Media 8
- Baja 3
Divulgaciones por año
- 2022: 3
- 2023: 3
- 2024: 2
- 2025: 4
- 2026: 4
-
Graylog vulnerable to instantiation of arbitrary classes triggered by API request esta entrada
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