FKIE_CVE-2020-2101

Vulnerability from fkie_nvd - Published: 2020-01-29 16:15 - Updated: 2026-06-17 03:11
Severity
5.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier did not use a constant-time comparison function for validating connection secrets, which could potentially allow an attacker to use a timing attack to obtain this secret.
References
jenkinsci-cert@googlegroups.comhttp://www.openwall.com/lists/oss-security/2020/01/29/1Mailing List, Third Party Advisory
jenkinsci-cert@googlegroups.comhttps://access.redhat.com/errata/RHBA-2020:0402
jenkinsci-cert@googlegroups.comhttps://access.redhat.com/errata/RHBA-2020:0675
jenkinsci-cert@googlegroups.comhttps://access.redhat.com/errata/RHSA-2020:0681
jenkinsci-cert@googlegroups.comhttps://access.redhat.com/errata/RHSA-2020:0683
jenkinsci-cert@googlegroups.comhttps://jenkins.io/security/advisory/2020-01-29/#SECURITY-1659Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/01/29/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHBA-2020:0402
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHBA-2020:0675
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0681
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0683
af854a3a-2127-422b-91ae-364da2661108https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1659Vendor Advisory
Impacted products
Vendor Product Version
jenkins jenkins *
jenkins jenkins *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Jenkins",
          "vendor": "Jenkins project",
          "versions": [
            {
              "lessThanOrEqual": "2.218",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "LTS 2.204.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "jenkinsci-cert@googlegroups.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
              "matchCriteriaId": "EAACE161-BE2D-4BB8-9795-3D76F19433C1",
              "versionEndIncluding": "2.204.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
              "matchCriteriaId": "F0F83033-6C48-4AF2-BB2A-157A09D79538",
              "versionEndIncluding": "2.218",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Jenkins 2.218 and earlier, LTS 2.204.1 and earlier did not use a constant-time comparison function for validating connection secrets, which could potentially allow an attacker to use a timing attack to obtain this secret."
    },
    {
      "lang": "es",
      "value": "Jenkins versiones 2.218 y anteriores, versiones LTS 2.204.1 y anteriores, no usaban una funci\u00f3n de comparaci\u00f3n de tiempo constante para comprobar secretos de conexi\u00f3n, lo que podr\u00eda potencialmente permitir a un atacante usar un ataque de sincronizaci\u00f3n para obtener este secreto."
    }
  ],
  "id": "CVE-2020-2101",
  "lastModified": "2026-06-17T03:11:45.503",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:S/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 6.8,
        "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": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-01-29T16:15:12.240",
  "references": [
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2020/01/29/1"
    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "url": "https://access.redhat.com/errata/RHBA-2020:0402"
    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "url": "https://access.redhat.com/errata/RHBA-2020:0675"
    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "url": "https://access.redhat.com/errata/RHSA-2020:0681"
    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "url": "https://access.redhat.com/errata/RHSA-2020:0683"
    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1659"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2020/01/29/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHBA-2020:0402"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHBA-2020:0675"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2020:0681"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2020:0683"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1659"
    }
  ],
  "sourceIdentifier": "jenkinsci-cert@googlegroups.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "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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