Heap-based Buffer Overflow
CVE-2024-4323
Summary
Linguistic Lumberjack is a critical Memory Corruption vulnerability in Fluent Bit. It affects fluent-bit versions 2.0.7 through 2.2.2 and 3.0.0 through 3.0.3. This issue lies in the embedded HTTP server's parsing of "trace" requests and may result in Denial of Service or Information Disclosure. Particular vulnerable implementations under limited conditions could also allow for Remote Code Execution. The issue resides in the endpoints "/api/v1/traces" and "/api/v1/trace" which, configured or not, are accessible to any user. The parsing of requests to this endpoint incorrectly assume that the types are always "MSGPACK_OBJECT_STRs" without further validation. A malicious user could abuse this to trigger Memory Corruption issues, which can crash the server and lead to Denial of Service. It might also be possible to read adjacent memory.
- LOW
- NETWORK
- HIGH
- UNCHANGED
- NONE
- NONE
- HIGH
- HIGH
CWE-122 - Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
References
Advisory Timeline
- Published