---
cve: "CVE-2023-6779"
severity: "HIGH"
cvss: 8.2
epss: "3.2%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2024-01-31 14:07:41"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:58:05+02:00"
---

# CVE-2023-6779

> 8.2 HIGH · 🧪 PoC

## Beschreibung

An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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 | Gering | warn |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- ef321e23c20eebc6d6fb4044425c00e6df27b05f (Commit)
- ef321e23c20eebc6d6fb4044425c00e6df27b05f (Commit)

## Referenzen

- <http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html>
- <http://seclists.org/fulldisclosure/2024/Feb/3>
- <https://access.redhat.com/security/cve/CVE-2023-6779>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2254395>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/>
- <https://security.gentoo.org/glsa/202402-01>
- <https://www.openwall.com/lists/oss-security/2024/01/30/6>
- <https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt>
- <https://security.netapp.com/advisory/ntap-20240223-0006/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-6779) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_