gsd-2021-32066
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."
Aliases
Aliases
CVE-2021-32066


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-32066",
    "description": "An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \"StartTLS stripping attack.\"",
    "id": "GSD-2021-32066",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-32066.html",
      "https://www.debian.org/security/2022/dsa-5066",
      "https://access.redhat.com/errata/RHSA-2022:0708",
      "https://access.redhat.com/errata/RHSA-2022:0672",
      "https://access.redhat.com/errata/RHSA-2022:0582",
      "https://access.redhat.com/errata/RHSA-2022:0581",
      "https://access.redhat.com/errata/RHSA-2022:0544",
      "https://access.redhat.com/errata/RHSA-2022:0543",
      "https://access.redhat.com/errata/RHSA-2021:3982",
      "https://access.redhat.com/errata/RHSA-2021:3559",
      "https://access.redhat.com/errata/RHSA-2021:3020",
      "https://ubuntu.com/security/CVE-2021-32066",
      "https://advisories.mageia.org/CVE-2021-32066.html",
      "https://security.archlinux.org/CVE-2021-32066",
      "https://linux.oracle.com/cve/CVE-2021-32066.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-32066"
      ],
      "details": "An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \"StartTLS stripping attack.\"",
      "id": "GSD-2021-32066",
      "modified": "2023-12-13T01:23:08.959048Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
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        "ID": "CVE-2021-32066",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
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              "vendor_name": "n/a"
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      "data_type": "CVE",
      "data_version": "4.0",
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            "value": "An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \"StartTLS stripping attack.\""
          }
        ]
      },
      "problemtype": {
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                "lang": "eng",
                "value": "n/a"
              }
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      },
      "references": {
        "reference_data": [
          {
            "name": "https://hackerone.com/reports/1178562",
            "refsource": "MISC",
            "url": "https://hackerone.com/reports/1178562"
          },
          {
            "name": "[debian-lts-announce] 20211013 [SECURITY] [DLA 2780-1] ruby2.3 security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20210902-0004/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20210902-0004/"
          },
          {
            "name": "https://www.ruby-lang.org/en/news/2021/07/07/starttls-stripping-in-net-imap/",
            "refsource": "CONFIRM",
            "url": "https://www.ruby-lang.org/en/news/2021/07/07/starttls-stripping-in-net-imap/"
          },
          {
            "name": "https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922a",
            "refsource": "CONFIRM",
            "url": "https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922a"
          },
          {
            "name": "[debian-lts-announce] 20230430 [SECURITY] [DLA 3408-1] jruby security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html"
          },
          {
            "name": "GLSA-202401-27",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202401-27"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
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                    "versionEndIncluding": "2.6.7",
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                    "versionEndExcluding": "9.2.6.1",
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                "negate": false,
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        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \"StartTLS stripping attack.\""
          },
          {
            "lang": "es",
            "value": "Se ha detectado un problema en Ruby versiones hasta 2.6.7, versiones 2.7.x hasta 2.7.3, y versiones 3.x hasta 3.0.1. Net::IMAP no lanza una excepci\u00f3n cuando StartTLS falla con una respuesta desconocida, lo que podr\u00eda permitir a atacantes tipo man-in-the-middle omitir las protecciones TLS, al aprovechar una posici\u00f3n de red entre el cliente y el registro para bloquear el comando StartTLS, tambi\u00e9n se conoce como \"StartTLS stripping attack\""
          }
        ],
        "id": "CVE-2021-32066",
        "lastModified": "2024-01-24T05:15:10.040",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.8,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 4.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
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                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.4,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                "version": "3.1"
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              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-08-01T19:15:07.697",
        "references": [
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            "source": "cve@mitre.org",
            "tags": [
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          },
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        "vulnStatus": "Modified",
        "weaknesses": [
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                "value": "CWE-755"
              }
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            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}


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