---
cve: "CVE-2023-32067"
severity: "HIGH"
cvss: 7.5
epss: "1.6%"
vendor: "c-ares"
kev: false
exploited: false
published: "2023-05-25 23:15:09"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T17:38:33+02:00"
---

# CVE-2023-32067

> 7.5 HIGH · 🧪 PoC

## Beschreibung

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

## 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 |

## Patch verfügbar (OSV)

- 6360e96b5cf8e5980c887ce58ef727e53d77243a (Commit)

## Referenzen

- <https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc>
- <https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/>
- <https://www.debian.org/security/2023/dsa-5419>
- <https://lists.debian.org/debian-lts-announce/2023/06/msg00034.html>
- <https://security.gentoo.org/glsa/202310-09>
- <https://security.netapp.com/advisory/ntap-20240605-0004/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-32067) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_