---
cve: "CVE-2023-43644"
severity: "CRITICAL"
cvss: 9.1
epss: "0.8%"
vendor: "SagerNet"
kev: false
exploited: false
published: "2023-09-25 20:15:11"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-10T09:21:36+02:00"
---

# CVE-2023-43644

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

Sing-box is an open source proxy system. Affected versions are subject to an authentication bypass when specially crafted requests are sent to sing-box. This affects all SOCKS5 inbounds with user authentication and an attacker may be able to bypass authentication. Users are advised to update to sing-box 1.4.4 or to 1.5.0-rc.4. Users unable to update should not expose the SOCKS5 inbound to insecure environments.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- e57207a1bcf9d69a491363e1491dd0a37c2f69a0 (Commit)

## Referenzen

- <https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2023-43644/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_