Cisco Snort _bnfa_search_csparse_nfa Use-After-Free Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco Snort. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the _bnfa_search_csparse_nfa method. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the service account.
Additional Details
Cisco has issued an update to correct this vulnerability. More details can be found at:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-dcerpc-vulns-J9HNF4tH
Disclosure Timeline
- 2025-08-12 - Vulnerability reported to vendor
- 2026-01-28 - Coordinated public release of advisory
- 2026-01-28 - Advisory Updated
Credit
Guy Lederfein of Trend Research
