fkie_cve-2021-25635
Vulnerability from fkie_nvd
Published
2025-03-21 15:15
Modified
2025-12-10 19:18
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to self sign an ODF document, with a signature untrusted by the target, then modify it to change the signature algorithm to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.
References
security@documentfoundation.orghttps://www.libreoffice.org/about-us/security/advisories/cve-2021-25635/Vendor Advisory
Impacted products
Vendor Product Version
libreoffice libreoffice *
libreoffice libreoffice *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "12D2CA40-15EE-4996-B754-CCD7128B4FDD",
              "versionEndExcluding": "7.0.5.1",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "381AA7ED-22CB-4BC0-8DF5-6CE16A741C26",
              "versionEndIncluding": "7.1.1.1",
              "versionStartIncluding": "7.1.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Improper Certificate Validation vulnerability in LibreOffice allowed \nan attacker to self sign an ODF document, with a signature untrusted by \nthe target, then modify it to change the signature algorithm to an \ninvalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a \nvalid signature issued by a trusted person\n\n\nThis issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de validaci\u00f3n de certificado incorrecta en LibreOffice permiti\u00f3 a un atacante autofirmar un documento ODF, con una firma que no era de confianza para el destino, y luego modificarlo para cambiar el algoritmo de firma a uno no v\u00e1lido (o desconocido para LibreOffice) y LibreOffice presentar\u00eda incorrectamente dicha firma con un algoritmo desconocido como una firma v\u00e1lida emitida por una persona confiable. Este problema afecta a LibreOffice: desde 7.0 antes de 7.0.5, desde 7.1 antes de 7.1.1."
    }
  ],
  "id": "CVE-2021-25635",
  "lastModified": "2025-12-10T19:18:58.750",
  "metrics": {
    "cvssMetricV31": [
      {
        "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"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.2,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@documentfoundation.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-03-21T15:15:35.707",
  "references": [
    {
      "source": "security@documentfoundation.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.libreoffice.org/about-us/security/advisories/cve-2021-25635/"
    }
  ],
  "sourceIdentifier": "security@documentfoundation.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "security@documentfoundation.org",
      "type": "Secondary"
    }
  ]
}


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