FKIE_CVE-2020-15522

Vulnerability from fkie_nvd - Published: 2021-05-20 12:15 - Updated: 2025-07-17 17:04
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.
References
cve@mitre.orghttps://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522Third Party Advisory
cve@mitre.orghttps://github.com/bcgit/bc-java/wiki/CVE-2020-15522Third Party Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20210622-0007/
cve@mitre.orghttps://www.bouncycastle.org/releasenotes.htmlRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bcgit/bc-java/wiki/CVE-2020-15522Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210622-0007/
af854a3a-2127-422b-91ae-364da2661108https://www.bouncycastle.org/releasenotes.htmlRelease Notes, Vendor Advisory
Impacted products
Vendor Product Version
bouncycastle bc-csharp *
bouncycastle bouncy_castle_fips_.net_api *
bouncycastle fips_java_api *
bouncycastle fips_java_api *
bouncycastle the_bouncy_castle_crypto_package_for_java *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:bouncycastle:bc-csharp:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E617E18C-5957-450B-A6F2-F3A5E8202D3F",
              "versionEndExcluding": "1.8.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:bouncycastle:bouncy_castle_fips_.net_api:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4A4C68F3-451F-46C7-932A-1D04828CB87B",
              "versionEndExcluding": "1.0.1.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F0B7168C-AAB1-4E4D-8B38-C50C38FBF3D6",
              "versionEndExcluding": "1.0.1.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "91805F10-A585-4724-9A09-141031E303A2",
              "versionEndExcluding": "1.0.2.1",
              "versionStartIncluding": "1.0.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:bouncycastle:the_bouncy_castle_crypto_package_for_java:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A7D7F6F7-8F74-41E0-9AFA-2FB26773DF69",
              "versionEndExcluding": "1.66",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures."
    },
    {
      "lang": "es",
      "value": "Bouncy Castle BC Java versiones anteriores a 1.66, BC C # .NET versiones anteriores a 1.8.7, BC-FJA versiones anteriores a 1.0.1.2, 1.0.2.1 y BC-FNA versiones anteriores a 1.0.1.1, presentan un problema de sincronizaci\u00f3n dentro de la biblioteca EC math que puede exponer informaci\u00f3n sobre la clave privada cuando un atacante es capaz de  observar informaci\u00f3n de sincronizaci\u00f3n para la generaci\u00f3n de m\u00faltiples firmas ECDSA deterministas"
    }
  ],
  "id": "CVE-2020-15522",
  "lastModified": "2025-07-17T17:04:58.987",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-05-20T12:15:08.003",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/bcgit/bc-java/wiki/CVE-2020-15522"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://security.netapp.com/advisory/ntap-20210622-0007/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://www.bouncycastle.org/releasenotes.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/bcgit/bc-java/wiki/CVE-2020-15522"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://security.netapp.com/advisory/ntap-20210622-0007/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://www.bouncycastle.org/releasenotes.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.