---
cve: "CVE-2022-47517"
severity: "HIGH"
cvss: 7.5
epss: "1.6%"
vendor: "n/a"
kev: false
exploited: false
published: "2022-12-18 05:15:11"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-11-03T11:16:44+01:00"
---

# CVE-2022-47517

> 7.5 HIGH · 🧪 PoC

## Beschreibung

An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.19. It allows remote attackers to cause a denial of service (daemon crash) via a crafted UDP message that causes a url_canonize2 heap-based buffer over-read because of an off-by-one error.

## CNA-Record (Kanon, cvelistV5)

- CNA: **mitre**
- State: PUBLISHED
- Stand: 2025-04-17 18:51:28

## CISA-Anreicherung (vulnrichment/ADP)

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

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-193** — Off-by-one Error
  A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

## Patch verfügbar (OSV)

- 22c1bd191f0acbf11f0c0fbea1845d9bf9dcd47e (Commit)
- bfc79d85c8f3a4798a3305fb98f5a11c11d0d29f (Commit)

## Referenzen

- <https://github.com/drachtio/drachtio-server/issues/243>
- <https://github.com/davehorton/sofia-sip/commit/22c1bd191f0acbf11f0c0fbea1845d9bf9dcd47e>
- <https://github.com/davehorton/sofia-sip/commit/bfc79d85c8f3a4798a3305fb98f5a11c11d0d29f>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2022-47517/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_