CVE-1999-0103

Echo/Chargen - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-1999-0103. PoCs published by HORKimhab, including Metasploit module auxiliary/scanner/chargen/chargen_probe.

AI-analyzed exploit summary The repository contains a placeholder markdown file for CVE-1999-0103, describing a UDP bomb/DoS attack using echo and chargen services. However, it lacks any functional exploit code, technical details, or implementation guidance.

Description

Echo and chargen, or other combinations of UDP services, can be used in tandem to flood the server, a.k.a. UDP bomb or UDP packet storm.

Exploits (2)

github STUB
by HORKimhab · shellpoc
https://github.com/HORKimhab/poc-cve-collection/tree/main/1999/0xxx/CVE-1999-0103.md

The repository contains a placeholder markdown file for CVE-1999-0103, describing a UDP bomb/DoS attack using echo and chargen services. However, it lacks any functional exploit code, technical details, or implementation guidance.

Classification
Stub 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: UDP services (e.g., echo, chargen)
No auth needed
Prerequisites: Access to UDP services (echo/chargen) on a target system · Network connectivity to the target
mistral-large-3 · analyzed Jul 15, 2026 Full analysis →
metasploit SCANNER
rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/chargen/chargen_probe.rb

This Metasploit module scans for the Chargen service (UDP port 19) and checks if it responds with expected character sequences. It can also be used to spoof requests for DRDoS testing.

Classification
Scanner 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Chargen service (RFC 864)
No auth needed
Prerequisites: Network access to UDP port 19 · Chargen service running on target
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/80171

Scores

EPSS 0.1463
EPSS Percentile 96.3%

Details

Status published
Published Feb 08, 1996
Tracked Since Feb 18, 2026