FKIE_CVE-2021-40834

Vulnerability from fkie_nvd - Published: 2021-12-10 14:15 - Updated: 2026-06-17 04:07
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Summary
A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.
References
cve-notifications-us@f-secure.comhttps://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameVendor Advisory
cve-notifications-us@f-secure.comhttps://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834Vendor Advisory
Impacted products
Vendor Product Version
f-secure safe *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "platforms": [
            "Android"
          ],
          "product": "F-Secure Mobile Security",
          "vendor": "F-Secure",
          "versions": [
            {
              "lessThan": "17.9*",
              "status": "affected",
              "version": "18.5x",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve-notifications-us@f-secure.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f-secure:safe:*:*:*:*:*:android:*:*",
              "matchCriteriaId": "0ECDAF3F-FF7E-46E1-AB62-8673A1256EA9",
              "versionEndIncluding": "17.9",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack."
    },
    {
      "lang": "es",
      "value": "Se ha detectado una vulnerabilidad de superposici\u00f3n de la interfaz de usuario en F-secure SAFE Browser para Android. Cuando el usuario hace clic en una URL aparentemente leg\u00edtima especialmente dise\u00f1ada, el navegador SAFE pasa a pantalla completa y oculta la interfaz de usuario. Un atacante remoto puede aprovechar esto para llevar a cabo un ataque de suplantaci\u00f3n de identidad"
    }
  ],
  "id": "CVE-2021-40834",
  "lastModified": "2026-06-17T04:07:30.460",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 3.4,
        "source": "cve-notifications-us@f-secure.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-12-10T14:15:10.093",
  "references": [
    {
      "source": "cve-notifications-us@f-secure.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame"
    },
    {
      "source": "cve-notifications-us@f-secure.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834"
    }
  ],
  "sourceIdentifier": "cve-notifications-us@f-secure.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1021"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.