CVE-2024-50609 Null dereference in n/a
Remote attackers can crash the Fluent Bit server by sending a packet with zero Content-Length to the OpenTelemetry input plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-50609?
CVE-2024-50609 is a high-severity vulnerability in n/a, published on 18 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-476
Which versions are affected by CVE-2024-50609?
1 open source package ship an affected version, including fluent-bit. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
fluent-bit Bitnami | From 3.1.9 | 3.1.10 |
Products include Treasuredata Fluent Bit.
How do I fix CVE-2024-50609?
Upgrade fluent-bit to 3.1.10 or later.
Is CVE-2024-50609 being exploited?
There is no known exploitation of CVE-2024-50609 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as AZL-57078, AZL-57086, BIT-fluent-bit-2024-50609, GHSA-4g89-mg9x-4chc.