---
cve: "CVE-2023-49298"
severity: "HIGH"
cvss: 7.5
epss: "1.2%"
vendor: "n/a"
kev: false
exploited: false
published: "2023-11-24 19:15:07"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:21:28+02:00"
---

# CVE-2023-49298

> 7.5 HIGH · 🧪 PoC

## Beschreibung

OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can be security related in realistic situations. A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access. (One might use cp when configuring access control, such as with the /etc/hosts.deny file specified in the IBM Support reference.) NOTE: this issue occurs less often in version 2.2.1, and in versions before 2.1.4, because of the default configuration in those versions.

## CVSS-Vektor

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

| 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 | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- d99134be83753266b5f7a79738aeab5b08db1e35 (Commit)
- 494aaaed89cb9fe9f2da3b6c6f465a4bc9f6a7e1 (Commit)

## Referenzen

- <https://github.com/openzfs/zfs/pull/15571>
- <https://github.com/openzfs/zfs/issues/15526>
- <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308>
- <https://news.ycombinator.com/item?id=38405731>
- <https://web.archive.org/web/20231124172959/https://www.ibm.com/support/pages/how-remove-missing%C2%A0newline%C2%A0or%C2%A0line%C2%A0too%C2%A0long-error-etchostsallow%C2%A0and%C2%A0etchostsdeny-files>
- <https://github.com/openzfs/zfs/releases/tag/zfs-2.2.2>
- <https://github.com/openzfs/zfs/releases/tag/zfs-2.1.14>
- <https://www.theregister.com/2023/12/04/two_new_versions_of_openzfs/>
- <https://bugs.gentoo.org/917224>
- <https://news.ycombinator.com/item?id=38770168>
- <https://lists.debian.org/debian-lts-announce/2024/03/msg00019.html>
- <https://lists.debian.org/debian-lts-announce/2025/04/msg00009.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-49298) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_