BIT-fluent-bit-2024-50609
Record from OSV · Published April 23, 2025
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| fluent-bit | Bitnami | 3.1.10 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Bitnami | fluent-bit | 3.1.9 |
Timeline
- Apr 23, 2025 CVE Published
- Apr 23, 2025 CVE Updated
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