---
cve: "CVE-2021-21272"
severity: "HIGH"
cvss: 7.7
epss: "1.5%"
vendor: "deislabs"
kev: false
exploited: false
published: "2021-01-25 19:15:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T03:44:09+02:00"
---

# CVE-2021-21272

> 7.7 HIGH · 🧪 PoC

## Beschreibung

ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerability. The directory support feature allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links. A well-crafted tarball or tarballs allow malicious artifact providers linking, writing, or overwriting specific files on the host filesystem outside of the user-specified directory unexpectedly with the same permissions as the user who runs `oras pull`. Users of the affected versions are impacted if they are `oras` CLI users who runs `oras pull`, or if they are Go programs, which invoke `github.com/deislabs/oras/pkg/content.FileStore`. The problem has been fixed in version 0.9.0. For `oras` CLI users, there is no workarounds other than pulling from a trusted artifact provider. For `oras` package users, the workaround is to not use `github.com/deislabs/oras/pkg/content.FileStore`, and use other content stores instead, or pull from a trusted artifact provider.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 96cd90423303f1bb42bd043cb4c36085e6e91e8e (Commit)

## Referenzen

- <https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhx>
- <https://github.com/deislabs/oras/commit/96cd90423303f1bb42bd043cb4c36085e6e91e8e>
- <https://github.com/deislabs/oras/releases/tag/v0.9.0>
- <https://pkg.go.dev/github.com/deislabs/oras/pkg/oras>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-21272) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_