rustsec-2026-0113
Vulnerability from osv_rustsec
Published
2026-04-27 12:00
Modified
2026-04-28 13:17
Summary
`unpack_in` can chmod arbitrary directories by following symlinks
Details

In versions 0.6.0 and earlier of astral-tokio-tar, the unpack_in API could inadvertently modify the permissions of external (i.e. non-archive) directories outside of the archive. An attacker could use this to contrite a tar archive that maliciously changes directory permissions outside of its intended hierarchy. This flaw only affects directories; individual file permissions cannot be modified via it.

See GHSA-j4xf-2g29-59ph for the equivalent flaw in the tar crate.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "file-disclosure"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "astral-tokio-tar",
        "purl": "pkg:cargo/astral-tokio-tar"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.6.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-xx64-wwv2-hcqq"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "In versions 0.6.0 and earlier of astral-tokio-tar, the unpack_in API could\ninadvertently modify the permissions of external (i.e. non-archive) directories\noutside of the archive. An attacker could use this to contrite a tar archive\nthat maliciously changes directory permissions outside of its intended\nhierarchy. This flaw only affects directories; individual file permissions\ncannot be modified via it.\n\nSee GHSA-j4xf-2g29-59ph for the equivalent flaw in the tar crate.",
  "id": "RUSTSEC-2026-0113",
  "modified": "2026-04-28T13:17:23Z",
  "published": "2026-04-27T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/astral-tokio-tar"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0113.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-xx64-wwv2-hcqq"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`unpack_in` can chmod arbitrary directories by following symlinks"
}


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