GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-0341 (GCVE-0-2021-0341)

Vulnerability from cvelistv5 – Published: 2021-02-10 16:50 – Updated: 2024-08-03 15:40
VLAI
Summary
In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • Information disclosure
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a Android Affected: Android-8.1 Android-9 Android-10 Android-11
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T15:40:00.192Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://source.android.com/security/bulletin/2021-02-01"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Android",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Android-8.1 Android-9 Android-10 Android-11"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Information disclosure",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-10T16:50:15.000Z",
        "orgId": "baff130e-b8d5-4e15-b3d3-c3cf5d5545c6",
        "shortName": "google_android"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://source.android.com/security/bulletin/2021-02-01"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@android.com",
          "ID": "CVE-2021-0341",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Android",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Android-8.1 Android-9 Android-10 Android-11"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069"
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Information disclosure"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://source.android.com/security/bulletin/2021-02-01",
              "refsource": "MISC",
              "url": "https://source.android.com/security/bulletin/2021-02-01"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "baff130e-b8d5-4e15-b3d3-c3cf5d5545c6",
    "assignerShortName": "google_android",
    "cveId": "CVE-2021-0341",
    "datePublished": "2021-02-10T16:50:15.000Z",
    "dateReserved": "2020-11-06T00:00:00.000Z",
    "dateUpdated": "2024-08-03T15:40:00.192Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-0341",
      "date": "2026-09-16",
      "epss": "0.00877",
      "percentile": "0.57239"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:google:android:8.1:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"B06BE74B-83F4-41A3-8AD3-2E6248F7B0B2\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"8DFAAD08-36DA-4C95-8200-C29FE5B6B854\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"D558D965-FA70-4822-A770-419E73BA9ED3\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"109DD7FD-3A48-4C3D-8E1A-4433B98E1E64\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069\"}, {\"lang\": \"es\", \"value\": \"En la funci\\u00f3n verifyHostName del archivo OkHostnameVerifier.java, existe una forma posible de aceptar un certificado para el dominio incorrecto debido a un uso de criptograf\\u00eda inapropiada.\u0026#xa0;Esto podr\\u00eda conllevar a una divulgaci\\u00f3n de informaci\\u00f3n remota sin ser necesarios privilegios de ejecuci\\u00f3n adicionales.\u0026#xa0;No es requerida una interacci\\u00f3n del usuario para su explotaci\\u00f3n. Producto: Android, Versiones: Android-8.1 Android-9 Android-10 Android-11, ID de Android: A-171980069\"}]",
      "id": "CVE-2021-0341",
      "lastModified": "2024-11-21T05:42:32.723",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:P/I:N/A:N\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-02-10T17:15:22.037",
      "references": "[{\"url\": \"https://source.android.com/security/bulletin/2021-02-01\", \"source\": \"security@android.com\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://source.android.com/security/bulletin/2021-02-01\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}]",
      "sourceIdentifier": "security@android.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-295\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-0341\",\"sourceIdentifier\":\"security@android.com\",\"published\":\"2021-02-10T17:15:22.037\",\"lastModified\":\"2024-11-21T05:42:32.723\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069\"},{\"lang\":\"es\",\"value\":\"En la funci\u00f3n verifyHostName del archivo OkHostnameVerifier.java, existe una forma posible de aceptar un certificado para el dominio incorrecto debido a un uso de criptograf\u00eda inapropiada.\u0026#xa0;Esto podr\u00eda conllevar a una divulgaci\u00f3n de informaci\u00f3n remota sin ser necesarios privilegios de ejecuci\u00f3n adicionales.\u0026#xa0;No es requerida una interacci\u00f3n del usuario para su explotaci\u00f3n. Producto: Android, Versiones: Android-8.1 Android-9 Android-10 Android-11, ID de Android: A-171980069\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:google:android:8.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B06BE74B-83F4-41A3-8AD3-2E6248F7B0B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"8DFAAD08-36DA-4C95-8200-C29FE5B6B854\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D558D965-FA70-4822-A770-419E73BA9ED3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"109DD7FD-3A48-4C3D-8E1A-4433B98E1E64\"}]}]}],\"references\":[{\"url\":\"https://source.android.com/security/bulletin/2021-02-01\",\"source\":\"security@android.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://source.android.com/security/bulletin/2021-02-01\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T05:17:52+00:00",
      "cve": "CVE-2021-0341",
      "id": "CVE-2021-0341",
      "initial_release_date": "2021-02-10T00:00:00+00:00",
      "product_status:fixed": "19",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "46",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "okhttp: information disclosure via improperly used cryptographic function",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-0341.json",
      "version": "3"
    }
  }
}



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.


Detection rules are retrieved from Rulezet.


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.