---
cve: "CVE-2009-20007"
severity: "CRITICAL"
cvss: 9.3
epss: "1.4%"
vendor: "Talkative"
kev: false
exploited: false
published: "2025-09-16 14:34:39"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-10T17:31:16+02:00"
---

# CVE-2009-20007

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

Talkative IRC v0.4.4.16 is vulnerable to a stack-based buffer overflow when processing specially crafted response strings sent to a connected client. An attacker can exploit this flaw by sending an overly long message that overflows a fixed-length buffer, potentially leading to arbitrary code execution in the context of the vulnerable process. This vulnerability is exploitable remotely and does not require authentication.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-121** — Stack-based Buffer Overflow
  A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

## Referenzen

- <https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/talkative_response.rb>
- <https://www.exploit-db.com/exploits/8227>
- <https://www.exploit-db.com/exploits/16459>
- <https://www.zeroscience.mk/en/vulnerabilities/ZSL-2009-4909.php>
- <https://web.archive.org/web/20090116203306/http://www.talkative-irc.com/>
- <https://www.vulncheck.com/advisories/talkative-irc-response-buffer-overflow>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2009-20007/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_