GHSA-5662-CV6M-63WH

Vulnerability from github – Published: 2025-07-18 20:13 – Updated: 2025-07-18 20:13
VLAI
Summary
melange's world-writable permissions expose SBOM files to potential image tampering
Details

It was discovered that the SBOM files generated by melange in apks had file system permissions mode 666:

$ apkrane ls https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz -P hello-wolfi --full --latest  | xargs wget -q -O  - | tar tzv 2>/dev/null var/lib/db/sbom
drwxr-xr-x root/root         0 2025-06-23 14:17 var/lib/db/sbom
-rw-rw-rw- root/root      3383 2025-06-23 14:17 var/lib/db/sbom/hello-wolfi-2.12.2-r1.spdx.json

This issue was introduced in commit 1b272db ("Persist workspace filesystem throughout package builds (#1836)") (v0.23.0).

Impact

This potentially allows an unprivileged user to tamper with apk SBOMs on a running image, potentially confusing security scanners. An attacker could also perform a DoS under special circumstances.

Patches

This issue was addressed in melange in e29494b ("fix: tighten up permissions for written SBOM files and signature tarballs (#2086)") (v0.29.5).

Acknowledgements

Thanks to Cody Harris H2O.ai and Markus Boehme for independently reporting this issue.

Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "chainguard.dev/melange"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.29.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-54059"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-276"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-07-18T20:13:21Z",
    "nvd_published_at": "2025-07-18T16:15:30Z",
    "severity": "MODERATE"
  },
  "details": "It was discovered that the SBOM files generated by melange in apks had file system permissions mode 666:\n```\n$ apkrane ls https://packages.wolfi.dev/os/x86_64/APKINDEX.tar.gz -P hello-wolfi --full --latest  | xargs wget -q -O  - | tar tzv 2\u003e/dev/null var/lib/db/sbom\ndrwxr-xr-x root/root         0 2025-06-23 14:17 var/lib/db/sbom\n-rw-rw-rw- root/root      3383 2025-06-23 14:17 var/lib/db/sbom/hello-wolfi-2.12.2-r1.spdx.json\n```\n\nThis issue was introduced in commit 1b272db (\"Persist workspace filesystem throughout package builds (#1836)\") ([v0.23.0](https://github.com/chainguard-dev/melange/releases/tag/v0.23.0)).\n\n### Impact\nThis potentially allows an unprivileged user to tamper with apk SBOMs on a running image, potentially confusing security scanners. An attacker could also perform a DoS under special circumstances.\n\n### Patches\nThis issue was addressed in melange in e29494b (\"fix: tighten up permissions for written SBOM files and signature tarballs (#2086)\") ([v0.29.5](https://github.com/chainguard-dev/melange/releases/tag/v0.29.5)).\n\n## Acknowledgements\n\nThanks to Cody Harris [H2O.ai](https://h2o.ai/) and Markus Boehme for independently reporting this issue.",
  "id": "GHSA-5662-cv6m-63wh",
  "modified": "2025-07-18T20:13:21Z",
  "published": "2025-07-18T20:13:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-5662-cv6m-63wh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54059"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/pull/1836"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/pull/2086"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/commit/1b272db2a0bb3441553284cc56d87236b4b64c04"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/commit/e29494b4a40a91619ec1c87a09003c6d5164cea1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chainguard-dev/melange"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/releases/tag/v0.29.5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "melange\u0027s world-writable permissions expose SBOM files to potential image tampering"
}



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