An issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write 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_metrics_ng() at prom_rw_prot.c.

The version of fluent-bit installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-50608 advisory.

  - An issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write 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_metrics_ng() at prom_rw_prot.c.
    (CVE-2024-50608)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of fluent-bit installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-50608 advisory.

  - An issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write 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_metrics_ng() at prom_rw_prot.c.
    (CVE-2024-50608)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Fluent Bit running on the remote host is prior to 3.2.7. It is, therefore, is affected by multiple vulnerabilities:

  - An issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write 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_metrics_ng() at     prom_rw_prot.c. (CVE-2024-50608)     
  - 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. (CVE-2024-50609)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
233094	Azure Linux 3.0 Security Update: fluent-bit (CVE-2024-50608)	Nessus	Azure Linux Local Security Checks	high
217090	CBL Mariner 2.0 Security Update: fluent-bit (CVE-2024-50608)	Nessus	MarinerOS Local Security Checks	high
216915	Fluent Bit Multiple Vulnerabilities	Nessus	Misc.	high

Detections

Analytics

CVE-2024-50608

high

Tenable Plugins

high

high

high