FKIE_CVE-2021-35252

Vulnerability from fkie_nvd - Published: 2022-12-16 16:15 - Updated: 2026-06-17 03:57
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext.
References
psirt@solarwinds.comhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35252Third Party Advisory
psirt@solarwinds.comhttps://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-2_release_notes.htmRelease Notes, Vendor Advisory
psirt@solarwinds.comhttps://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35252Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35252Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-2_release_notes.htmRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35252Patch, Vendor Advisory
Impacted products
Vendor Product Version
solarwinds serv-u *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Serv-U FTP Server",
          "vendor": "SolarWinds",
          "versions": [
            {
              "status": "affected",
              "version": "15.3.0"
            }
          ]
        }
      ],
      "source": "psirt@solarwinds.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "849E4BD2-BA9B-4C38-91E1-95116AA12AE2",
              "versionEndExcluding": "15.3.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Common encryption key appears to be used across all deployed instances of Serv-U FTP Server. Because of this an encrypted value that is exposed to an attacker can be simply recovered to plaintext."
    },
    {
      "lang": "es",
      "value": "Parece que se utiliza una clave de cifrado com\u00fan en todas las instancias implementadas del Serv-U FTP Server. Debido a esto, un valor cifrado que est\u00e1 expuesto a un atacante se puede recuperar simplemente en texto plano."
    }
  ],
  "id": "CVE-2021-35252",
  "lastModified": "2026-06-17T03:57:23.473",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "psirt@solarwinds.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-35252",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-17T20:17:44.705409Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2022-12-16T16:15:16.297",
  "references": [
    {
      "source": "psirt@solarwinds.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35252"
    },
    {
      "source": "psirt@solarwinds.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-2_release_notes.htm"
    },
    {
      "source": "psirt@solarwinds.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35252"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35252"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3-2_release_notes.htm"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35252"
    }
  ],
  "sourceIdentifier": "psirt@solarwinds.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-798"
        }
      ],
      "source": "psirt@solarwinds.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.