Tenable Research has discovered a critical memory corruption vulnerability dubbed Linguistic Lumberjack in Fluent Bit, a core component in the monitoring infrastructure of many cloud services.

Linguistic Lumberjack: Attacking Cloud Services via Logging Endpoints (Fluent Bit - CVE-2024-4323)

A memory corruption vulnerability in Fluent Bit versions 2.0.7 thru 3.0.3. This issue lies in the embedded http server’s parsing of trace requests and may result in denial of service conditions, information disclosure, or remote code execution.

Tenable Research is monitoring for signs of exploitation or abuse of this flaw.

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-2024-4323 advisory.

  - A memory corruption vulnerability in Fluent Bit versions 2.0.7 thru 3.0.3. This issue lies in the embedded     http server's parsing of trace requests and May result in denial of service conditions, information     disclosure, or remote code execution. (CVE-2024-4323)

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-2024-4323 advisory.

  - A memory corruption vulnerability in Fluent Bit versions 2.0.7 thru 3.0.3. This issue lies in the embedded     http server's parsing of trace requests and May result in denial of service conditions, information     disclosure, or remote code execution. (CVE-2024-4323)

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 3.0.4. It is, therefore, is affected by a heap-based buffer overflow vulnerability.

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
215324	Azure Linux 3.0 Security Update: fluent-bit (CVE-2024-4323)	Nessus	Azure Linux Local Security Checks	critical
201714	CBL Mariner 2.0 Security Update: fluent-bit (CVE-2024-4323)	Nessus	MarinerOS Local Security Checks	critical
197568	Fluent Bit Heap-based Buffer Overflow	Nessus	Misc.	critical

Detections

Analytics

CVE-2024-4323

critical

Tenable Plugins

critical

critical

critical