What’s Vulnerable › Vulnerabilities

CVE-2023-32649: DoS on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.0

• 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: 2023-09-19 · updated 2026-06-17
• Weakness: CWE-1286

Description

A Denial of Service (Dos) vulnerability in Nozomi Networks Guardian and CMC, due to improper input validation in certain fields used in the Asset Intelligence functionality of our IDS, allows an unauthenticated attacker to crash the IDS module by sending specially crafted malformed network packets. During the (limited) time window before the IDS module is automatically restarted, network traffic may not be analyzed.

Affected products

• Nozomi Networks CMC: from 22.6.0 before 22.6.3; from 23.0.0 before 23.1.0 — fixed in 22.6.3, 23.1.0
• Nozomi Networks Guardian: from 22.6.0 before 22.6.3; from 23.0.0 before 23.1.0 — fixed in 22.6.3, 23.1.0

How to fix

Upgrade to a fixed version: Nozomi Networks CMC 22.6.3, 23.1.0; Nozomi Networks Guardian 22.6.3, 23.1.0. Check the vendor advisory for mitigations.

References

• https://security.nozominetworks.com/NN-2023:10-01
• https://security.nozominetworks.com/NN-2023:10-01

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