Host TCP/IP Stack TCP/ICMP Fingerprinting information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Host. It has been classified as critical. Impacted is an unknown function of the component TCP/IP Stack. The manipulation as part of TCP/ICMP leads to information disclosure (Fingerprinting). This vulnerability is uniquely identified as CVE-1999-0454. Moreover, an exploit is present. Due to its background and reception, this vulnerability has an historic impact. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability was found in Host (unknown version). It has been rated as critical. This issue affects an unknown code block of the component TCP/IP Stack. The manipulation as part of a TCP/ICMP leads to a information disclosure vulnerability (Fingerprinting). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

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.

The weakness was disclosed 01/01/1999. The identification of this vulnerability is CVE-1999-0454. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/17/2026). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. Due to its background and reception, this vulnerability has a historic impact.

A public exploit has been developed by Fyodor in ANSI C. It is declared as highly functional. The vulnerability scanner Nessus provides a plugin with the ID 11268 , which helps to determine the existence of the flaw in a target environment.

Addressing this vulnerability is possible by firewalling All Ports. Attack attempts may be identified with Snort ID 463. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 79.

The vulnerability is also documented in the databases at X-Force (2053), Tenable (11268) and Vulnerability Center (SBV-1363†). The entries VDB-14331, VDB-14330 and VDB-14329 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.5
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Fingerprinting
Class: Information disclosure / Fingerprinting
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Fyodor
Programming Language: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 11268

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Snort ID: 463
Snort Message: PROTOCOL-ICMP unassigned type 7 undefined code
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

01/01/1999 🔍
01/01/1999 +0 days 🔍
01/01/1999 +0 days 🔍
06/30/2003 +1641 days 🔍
06/19/2014 +4007 days 🔍
04/17/2026 +4320 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-1999-0454 (🔍)
GCVE (CVE): GCVE-0-1999-0454
GCVE (VulDB): GCVE-100-14327
X-Force: 2053
Vulnerability Center: 1363 - Operating System Identified via OS Fingerprint, Low

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/20/2014 00:36
Updated: 04/17/2026 21:05
Changes: 06/20/2014 00:36 (63), 05/10/2019 14:52 (4), 04/17/2026 21:05 (20)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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