CVE-2024-0218: DoS on IDS parsing of malformed Radius packets in Guardian before 23.4.1

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-10 · updated 2026-06-17
Weakness: CWE-1286

Description

A Denial of Service (Dos) vulnerability in Nozomi Networks Guardian, caused by improper input validation in certain fields used in the Radius parsing functionality of our IDS, allows an unauthenticated attacker sending specially crafted malformed network packets to cause the IDS module to stop updating nodes, links, and assets. Network traffic may not be analyzed until the IDS module is restarted.

Affected products

Nozomi Networks Guardian: before 23.4.1 — fixed in 23.4.1

How to fix

Upgrade to a fixed version: Nozomi Networks Guardian 23.4.1. Check the vendor advisory for mitigations.

References

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