CVE-1999-0454: A remote attacker can sometimes identify the operating system of a host based on how it reacts to some IP or ICMP packet
Summary
A remote attacker can sometimes identify the operating system of a host based on how it reacts to some IP or ICMP packets, using a tool such as nmap or queso.
Severity
UNKNOWN
Source Attribution
Source: NVD · Updated: 2026-08-21T04:30:41.766Z · Confidence: high
Impact
Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.