NULL pointer dereference in Treasuredata Fluent Bit
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Treasuredata Fluent Bit — versions 3.1.9
Weakness classification (CWE)
References
- fluentbit.io/announcements/ (Product)
- github.com/fluent/fluent-bit/releases (Release Notes)
- www.ebryx.com/blogs/exploring-cve-2024-50608-and-cve-2024-50609 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2024-50609?
- CVE-2024-50609 is a high-severity vulnerability in Treasuredata Fluent Bit, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2025-02-18.
- How severe is CVE-2024-50609?
- High severity. CVSS v3 base score is 7.5 out of 10.