Vulnerability-Lookup

GHSA-VJXV-45G9-9296

Vulnerability from github – Published: 2022-08-10 18:40 – Updated: 2022-08-10 18:40

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.

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

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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"
}

CVE-2022-35929 (GCVE-0-2022-35929)

Vulnerability from cvelistv5 – Published: 2022-08-04 18:45 – Updated: 2025-04-22 17:43

Title

False positive signature verification in cosign

Summary

cosign is a container signing and verification utility. In versions prior to 1.10.1 cosign can report a false positive if any attestation exists. `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 and 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. This vulnerability can be reproduced with the `distroless.dev/static@sha256:dd7614b5a12bc4d617b223c588b4e0c833402b8f4991fb5702ea83afad1986e2` image. This image has a `vuln` attestation but not an `spdx` attestation. However, if you run `cosign verify-attestation --type=spdx` on this image, it incorrectly succeeds. This issue has been addressed in version 1.10.1 of cosign. Users are advised to upgrade. There are no known workarounds for this issue.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-22 15:42 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/sigstore/cosign/security/advis…	x_refsource_CONFIRM
https://github.com/sigstore/cosign/commit/c5fda01…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
sigstore	cosign	Affected: < 1.10.1

Show details on NVD website

JSON

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          "dateUpdated": "2024-08-03T09:51:59.114Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          }
        ],
        "title": "CVE Program Container"
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      {
        "metrics": [
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          "shortName": "CISA-ADP"
        },
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    ],
    "cna": {
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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