Security advisory

{
  "id": "94fc4d069f4e03c04a4f08ca987d9016bdb5c494f144bcfe6c90e7b790f56beb",
  "url": "https://osv.dev/vulnerability/CVE-2021-21272",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-21272",
    "summary": "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.",
    "evidence": "osv:CVE-2021-21272",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-21272",
      "aliases": [
        "BIT-oras-2021-21272",
        "CVE-2021-21272",
        "GHSA-g5v4-5x39-vwhx",
        "GO-2021-0099"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/oras-project/oras",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9f7669048990b0d0c186985737e6a6c3bb3f7ecc"
                },
                {
                  "fixed": "96cd90423303f1bb42bd043cb4c36085e6e91e8e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:deislabs:oras:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.4.0"
                      },
                      {
                        "fixed": "0.9.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "96cd90423303f1bb42bd043cb4c36085e6e91e8e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "96cd90423303f1bb42bd043cb4c36085e6e91e8e"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.9.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.8.1",
            "v0.8.0",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21272.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:41.814084757Z",
      "provider": "osv",
      "references": [
        "https://github.com/deislabs/oras/releases/tag/v0.9.0",
        "https://pkg.go.dev/github.com/deislabs/oras/pkg/oras",
        "https://github.com/deislabs/oras/commit/96cd90423303f1bb42bd043cb4c36085e6e91e8e",
        "https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhx"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-21272",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384511,
  "published_at": "2021-01-25T19:15:12.847+00:00"
}