Filebeat Beats has Buffer Overflow via Malformed Syslog Message or Malicious Tokenizer Pattern in Dissect Configuration
Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285) in Filebeat Syslog parser and the Libbeat Dissect processor can allow a user to trigger a Buffer Overflow (CAPEC-100) and cause a denial of service (panic/crash) of the Filebeat process via either a malformed Syslog message or a malicious tokenizer pattern in the Dissect configuration.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285) in Filebeat Syslog parser and the Libbeat Dissect processor can allow a user to trigger a Buffer Overflow (CAPEC-100) and cause a denial of service (panic/crash) of the Filebeat process via either a malformed Syslog message or a malicious tokenizer pattern in the Dissect configuration.
Buffer Overflow via Malformed Syslog Message or Malicious Tokenizer Pattern in github.com/elastic/beats
05 / REFERENCES
Further evidence
- https://discuss.elastic.co/t/filebeat-8-19-9-9-1-9-and-9-2-3-security-update-esa-2025-32/384180
- https://github.com/elastic/beats/commit/27a168fb1c598d4a16748e9a7382bc0d197335a5
- https://github.com/elastic/beats/commit/2f971a057eea68e057b47829950cd8c26805df30
- https://github.com/elastic/beats/commit/339fa3f887a14c91e0c955b50a3b8819393bd632
- https://github.com/elastic/elasticsearch
- https://nvd.nist.gov/vuln/detail/CVE-2025-68383
- https://github.com/advisories/GHSA-2mj3-6grc-px38