gsd-2021-22947
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server.
Aliases
Aliases



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  "GSD": {
    "alias": "CVE-2021-22947",
    "description": "When curl \u003e= 7.20.0 and \u003c= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker\u0027s injected data comes from the TLS-protected server.",
    "id": "GSD-2021-22947",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-22947.html",
      "https://access.redhat.com/errata/RHSA-2022:0635",
      "https://access.redhat.com/errata/RHSA-2021:4059",
      "https://ubuntu.com/security/CVE-2021-22947",
      "https://advisories.mageia.org/CVE-2021-22947.html",
      "https://security.archlinux.org/CVE-2021-22947",
      "https://access.redhat.com/errata/RHSA-2022:1354",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-22947.html",
      "https://linux.oracle.com/cve/CVE-2021-22947.html",
      "https://www.debian.org/security/2022/dsa-5197"
    ]
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  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
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      "id": "GSD-2021-22947",
      "modified": "2023-12-13T01:23:24.940822Z",
      "schema_version": "1.4.0"
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                    "criteria": "cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5722E753-75DE-4944-A11B-556CB299B57D",
                    "versionEndExcluding": "8.2.12",
                    "versionStartIncluding": "8.2.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DC0F9351-81A4-4FEA-B6B5-6E960A933D32",
                    "versionEndExcluding": "9.0.6",
                    "versionStartIncluding": "9.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "EED24E67-2957-4C1B-8FEA-E2D2FE7B97FC",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "When curl \u003e= 7.20.0 and \u003c= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker\u0027s injected data comes from the TLS-protected server."
          },
          {
            "lang": "es",
            "value": "Cuando en  curl versiones posteriores a 7.20.0 incluy\u00e9ndola, y versiones anteriores a 7.78.0 incluy\u00e9ndola, se conecta a un servidor IMAP o POP3 para recuperar datos usando STARTTLS para actualizar a la seguridad TLS, el servidor puede responder y enviar m\u00faltiples respuestas a la vez que curl almacena en cach\u00e9. curl entonces actualizar\u00eda a TLS pero no vaciar\u00eda la cola de respuestas almacenadas en cach\u00e9, sino que continuar\u00eda usando y confiando en las respuestas que obtuvo *antes* del protocolo de enlace TLS como si estuvieran autenticadas. Usando este fallo, permite a un atacante de tipo Man-In-The-Middle inyectar primero las respuestas falsas, luego pasar mediante el tr\u00e1fico TLS del servidor leg\u00edtimo y enga\u00f1ar a curl para que env\u00ede datos de vuelta al usuario pensando que los datos inyectados por el atacante provienen del servidor protegido por TLS"
          }
        ],
        "id": "CVE-2021-22947",
        "lastModified": "2024-03-27T15:03:30.377",
        "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": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.2,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-09-29T20:15:08.253",
        "references": [
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/Mar/29"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Exploit",
              "Issue Tracking",
              "Third Party Advisory"
            ],
            "url": "https://hackerone.com/reports/1334763"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.gentoo.org/glsa/202212-01"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20211029-0003/"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Release Notes",
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213183"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5197"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujul2022.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
          }
        ],
        "sourceIdentifier": "support@hackerone.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-345"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-310"
              }
            ],
            "source": "support@hackerone.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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