FKIE_CVE-2021-3978

Vulnerability from fkie_nvd - Published: 2025-01-29 10:15 - Updated: 2025-07-29 23:40
Severity ?
7.5 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
When copying files with rsync, octorpki uses the "-a" flag 0, which forces rsync to copy binaries with the suid bit set as root. Since the provided service definition defaults to root ( https://github.com/cloudflare/cfrpki/blob/master/package/octorpki.service ) this could allow for a vector, when combined with another vulnerability that causes octorpki to process a malicious TAL file, for a local privilege escalation.
References
cna@cloudflare.comhttps://github.com/cloudflare/cfrpki/security/advisories/GHSA-3pqh-p72c-fj85Vendor Advisory
Impacted products
Vendor Product Version
cloudflare octorpki *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cloudflare:octorpki:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "76835CC2-1E72-4632-9904-26EE9A5B2BDF",
              "versionEndExcluding": "1.4.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When copying files with rsync, octorpki uses the \"-a\" flag 0, which forces rsync to copy binaries with the suid bit set as root. Since the provided service definition defaults to root ( https://github.com/cloudflare/cfrpki/blob/master/package/octorpki.service ) this could allow for a vector, when combined with another vulnerability that causes octorpki to process a malicious TAL file, for a local privilege escalation."
    },
    {
      "lang": "es",
      "value": "Al copiar archivos con rsync, octorpki utiliza el indicador \"-a\" 0, que obliga a rsync a copiar binarios con el bit suid establecido como root. Dado que la definici\u00f3n de servicio proporcionada tiene como valor predeterminado root (https://github.com/cloudflare/cfrpki/blob/master/package/octorpki.service), esto podr\u00eda permitir un vector, cuando se combina con otra vulnerabilidad que hace que octorpki procese un archivo TAL malicioso, para una escalada de privilegios local."
    }
  ],
  "id": "CVE-2021-3978",
  "lastModified": "2025-07-29T23:40:21.880",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.8,
        "impactScore": 6.0,
        "source": "cna@cloudflare.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-01-29T10:15:07.750",
  "references": [
    {
      "source": "cna@cloudflare.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/cloudflare/cfrpki/security/advisories/GHSA-3pqh-p72c-fj85"
    }
  ],
  "sourceIdentifier": "cna@cloudflare.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ],
      "source": "cna@cloudflare.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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