CVE-2024-50609

An issue was discovered in Fluent Bit 3.1.9. When the OpenTelemetry input plugin is running and listening on an IP address and port, one can send a packet with Content-Length: 0 and it crashes the server. Improper handling of the case when Content-Length is 0 allows a user (with access to the endpoint) to perform a remote Denial of service attack. The crash happens because of a NULL pointer dereference when 0 (from the Content-Length) is passed to the function cfl_sds_len, which in turn tries to cast a NULL pointer into struct cfl_sds. This is related to process_payload_traces_proto_ng() at opentelemetry_prot.c.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://fluentbit.io/announcements/	Product
https://github.com/fluent/fluent-bit/releases	Release Notes
https://www.ebryx.com/blogs/exploring-cve-2024-50608-and-cve-2024-50609	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:treasuredata:fluent_bit:3.1.9:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-02-18 18:15

Updated : 2025-04-22 14:48

NVD link : CVE-2024-50609

Mitre link : CVE-2024-50609

CVE.ORG link : CVE-2024-50609

JSON object : View

Products Affected

treasuredata

fluent_bit

CWE

CWE-476

NULL Pointer Dereference

{"id": "CVE-2024-50609", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-02-18T18:15:25.833", "references": [{"url": "https://fluentbit.io/announcements/", "tags": ["Product"], "source": "[email protected]"}, {"url": "https://github.com/fluent/fluent-bit/releases", "tags": ["Release Notes"], "source": "[email protected]"}, {"url": "https://www.ebryx.com/blogs/exploring-cve-2024-50608-and-cve-2024-50609", "tags": ["Exploit", "Third Party Advisory"], "source": "[email protected]"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Fluent Bit 3.1.9. When the OpenTelemetry input plugin is running and listening on an IP address and port, one can send a packet with Content-Length: 0 and it crashes the server. Improper handling of the case when Content-Length is 0 allows a user (with access to the endpoint) to perform a remote Denial of service attack. The crash happens because of a NULL pointer dereference when 0 (from the Content-Length) is passed to the function cfl_sds_len, which in turn tries to cast a NULL pointer into struct cfl_sds. This is related to process_payload_traces_proto_ng() at opentelemetry_prot.c."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en Fluent Bit 3.1.9. Cuando el complemento de entrada OperTelemetry se ejecuta y escucha en una direcci\u00f3n IP y un puerto, uno puede enviar un paquete con contenido-longitud: 0 y bloquea el servidor. La gesti\u00f3n inadecuada del caso cuando la longitud de contenido es 0 permite que un usuario (con acceso a el endpoint) realice un ataque remoto de denegaci\u00f3n de servicio. El bloqueo ocurre debido a una deserferencia de puntero nulo cuando 0 (desde la longitud del contenido) se pasa a la funci\u00f3n CFL_SDS_LEN, que a su vez intenta lanzar un puntero nulo en Struct CFL_SDS. Esto est\u00e1 relacionado con process_payload_traces_proto_ng () en opentelemetry_prot.c."}], "lastModified": "2025-04-22T14:48:17.650", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:treasuredata:fluent_bit:3.1.9:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0365AE96-83F3-401B-A605-62703B78773F"}], "operator": "OR"}]}], "sourceIdentifier": "[email protected]"}