{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "uucore"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-440",
      "CWE-693"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-07T19:36:17Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "`determine_backup_mode` in `src/uucore/src/lib/features/backup_control.rs` only checks `--backup`/`-b` and returns `BackupMode::None` when only `--suffix` is given. GNU enables backup mode when `--suffix` is used alone (defaulting to existing/numbered, or `$VERSION_CONTROL`). Affects `cp`, `install`, `mv`, `ln` which share this code.\n\n```\n# uutils: no backup created\n$ coreutils cp --suffix=.bak src dest      # dest.bak NOT created\n# GNU: dest.bak created\n$ cp --suffix=.bak src dest\n```\n\n**Impact:** users/scripts relying on `--suffix` to back up a file before overwrite get silent data loss; breaks GNU compatibility across four utilities. Recommendation: enable backup mode when `--suffix` is present.\n\n_Note: this is primarily a GNU-compatibility/data-safety divergence rather than a classic exploitable vulnerability \u2014 review whether it warrants a CVE._\n\n**Remediation:** Acknowledged by Canonical; fixed in PR #9741 (`uucore: use --suffix to enable backup mode`), commit `939ab037a`, merged 2025-12-21. `determine_backup_mode` now has a `--suffix`-alone branch that resolves the mode from `$VERSION_CONTROL` (defaulting to `existing`). Released in **uucore 0.6.0** and later (vulnerable: `\u003c 0.6.0`). Regression tests added in the same file: `test_backup_mode_suffix_without_backup_option` and `test_backup_mode_suffix_without_backup_option_with_env_var`.\n\n---\n_Reported by Zellic in the *uutils coreutils Program Security Assessment* (prepared for Canonical, Jan 20 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`. Finding 3.7. Credit: Zellic._",
  "id": "GHSA-fqf6-gxhh-2xhw",
  "modified": "2026-07-07T19:36:17Z",
  "published": "2026-07-07T19:36:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/uutils/coreutils/security/advisories/GHSA-fqf6-gxhh-2xhw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/uutils/coreutils/pull/9741"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/uutils/coreutils"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "uutils coreutils: cp/install/mv/ln --suffix alone does not enable backup mode (silent data loss vs GNU)"
}