BREW-GGSHIELD-CVE-2020-6173 (GHSA-2828-9VH6-9M6J)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:50 – Updated: 2026-09-10 19:16 – Source website
VLAI
Summary
Client Denial of Service on TUF
Details

Impact

An attacker who can gain file access to the repository and modify metadata files may cause a denial of service to clients by creating many invalid signatures on a metadata file. Having a large number of signatures to verify will delay the moment when the client will determine the signature is not valid. This delay may be for at least a few minutes, but possibly could be longer especially if multiple files are impacted.

The tuf maintainers would like to thank Erik MacLean of Analog Devices, Inc. for reporting this issue.

Patches

No fix exists for this issue.

Workarounds

No workarounds are known for this issue.

References

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "tuf",
        "resource_purl": "pkg:pypi/tuf@7.0.1",
        "upstream_fixed_in": "0.12.2"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "ggshield",
        "purl": "pkg:brew/ggshield"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.53.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/tuf@7.0.1",
        "name": "tuf",
        "resource": "tuf",
        "strategy": "registry",
        "subject_version": "7.0.1"
      }
    ]
  },
  "details": "### Impact\nAn attacker who can gain file access to the repository and modify metadata files may cause a denial of service to clients by creating many invalid signatures on a metadata file. Having a large number of signatures to verify will delay the moment when the client will determine the signature is not valid. This delay may be for at least a few minutes, but possibly could be longer especially if multiple files are impacted.\n\nThe tuf maintainers would like to thank Erik MacLean of Analog Devices, Inc. for reporting this issue.\n\n### Patches\nNo fix exists for this issue. \n\n### Workarounds\nNo workarounds are known for this issue.\n\n### References\n* [CVE-2020-6173](https://nvd.nist.gov/vuln/detail/CVE-2020-6173)\n* [Issue #973](https://github.com/theupdateframework/tuf/issues/973)",
  "id": "BREW-ggshield-CVE-2020-6173",
  "modified": "2026-09-10T19:16:59Z",
  "published": "2026-08-13T16:50:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/theupdateframework/tuf/security/advisories/GHSA-2828-9vh6-9m6j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-6173"
    },
    {
      "type": "WEB",
      "url": "https://github.com/theupdateframework/tuf/issues/973"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/tuf/PYSEC-2020-146.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/theupdateframework/tuf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/theupdateframework/tuf/commits/develop"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Client Denial of Service on TUF",
  "upstream": [
    "GHSA-2828-9vh6-9m6j",
    "CVE-2020-6173",
    "PYSEC-2020-146"
  ]
}



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