CVE-2024-50609: Null Pointer Dereference
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 cflsdslen, which in turn tries to cast a NULL pointer into struct cflsds. This is related to processpayloadtracesprotong() at opentelemetryprot.c.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2024-50609?
The severity of CVE-2024-50609 is classified as moderate due to the potential for denial of service.
How do I fix CVE-2024-50609?
To fix CVE-2024-50609, upgrade to Fluent Bit version 3.1.10 or later where the issue has been addressed.
What causes the CVE-2024-50609 vulnerability?
CVE-2024-50609 is caused by improper handling of zero Content-Length headers by the OpenTelemetry input plugin in Fluent Bit.
Who is affected by CVE-2024-50609?
All users running Fluent Bit versions prior to 3.1.10 with the OpenTelemetry input plugin enabled are affected by CVE-2024-50609.
What impact does CVE-2024-50609 have?
The impact of CVE-2024-50609 is a crash of the Fluent Bit server, resulting in service disruption.