A vulnerability in the Suricata network engine allows unauthenticated attackers to trigger a denial of service via a segmentation fault.

This is a NULL pointer dereference (CWE-476) occurring when the entropy keyword is not anchored to a sticky buffer. An unauthenticated remote attacker can trigger this condition by sending traffic that matches a malformed rule, resulting in the termination of the Suricata process.

The exploitation of this flaw leads to a denial of service for the network intrusion detection and prevention systems. Given a CVSS score of 7.5, the impact is significant because the loss of visibility or active filtering capabilities leaves the network exposed to other malicious activities. Organizations relying on Suricata for perimeter security or compliance monitoring face operational risk during the period of service unavailability.

Immediate Action: Update the Suricata software to version 8.0.1 or later to incorporate the official patch.

Proactive Monitoring: Monitor service logs for unexpected process crashes, segmentation faults, or recurring restarts of the Suricata engine.

Compensating Controls: If immediate patching is not feasible, disable any rules that utilize the entropy keyword or ensure that all such rules are correctly anchored to a sticky buffer as specified by the vendor.

Public Exploit Available: No

This vulnerability presents a clear risk of service disruption for essential security infrastructure. Administrators should prioritize the deployment of version 8.0.1 across all affected Suricata instances to ensure continued stability and security coverage. If an immediate update is not possible, implementing the vendor-provided configuration workaround is necessary to prevent potential denial of service attacks.