ghsa-vjxv-45g9-9296
Vulnerability from github
Published
2022-08-10 18:40
Modified
2022-08-10 18:40
Severity ?
7.1 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Summary
cosign's `cosign verify-attestaton --type` can report a false positive if any attestation exists
Details

cosign verify-attestation used with the --type flag will report a false positive verification when:

  • There is at least one attestation with a valid signature
  • There are NO attestations of the type being verified (--type defaults to "custom")

This can happen when signing with a standard keypair and with "keyless" signing with Fulcio. Users should upgrade to cosign version 1.10.1 or greater for a patch. Currently the only workaround is to upgrade.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sigstore/cosign"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-35929"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-08-10T18:40:38Z",
    "nvd_published_at": "2022-08-04T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "`cosign verify-attestation` used with the `--type` flag will report a false positive verification when:\n\n- There is at least one attestation with a valid signature\n- There are NO attestations of the type being verified (--type defaults to \"custom\")\n\nThis can happen when signing with a standard keypair and with \"keyless\" signing with Fulcio. Users should upgrade to cosign version 1.10.1 or greater for a patch. Currently the only workaround is to upgrade.",
  "id": "GHSA-vjxv-45g9-9296",
  "modified": "2022-08-10T18:40:38Z",
  "published": "2022-08-10T18:40:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sigstore/cosign/security/advisories/GHSA-vjxv-45g9-9296"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-35929"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sigstore/cosign/commit/c5fda01a8ff33ca981f45a9f13e7fb6bd2080b94"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sigstore/cosign"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cosign\u0027s `cosign verify-attestaton  --type` can report a false positive if any attestation exists"
}


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