{
  "cveId": "CVE-2021-22947",
  "url": "https://patchblox.com/security/cve/CVE-2021-22947",
  "summary": "CVE-2021-22947 is fixed in 28 products on 2 platforms, first by curl 7.58.0-2ubuntu3.15, released September 14, 2021. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "Open Source Curl Remote Code Execution Vulnerability",
  "description": "The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.\n\nSecurity Fix(es):\n\n* curl: Requirement to use TLS not properly enforced for IMAP, POP3, and FTP protocols (CVE-2021-22946)\n\n* curl: Server responses received before STARTTLS processed after TLS handshake (CVE-2021-22947)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "published": "2021-09-14T17:00:00Z",
  "severity": "Critical",
  "cvss": 6.1,
  "epss": 0.03009,
  "epssPercentile": 0.87481,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": true,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-22947",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for 32-bit Systems",
      "fixedVersion": "18363.2037",
      "fix": "KB5009545",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009545",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for ARM64-based Systems",
      "fixedVersion": "18363.2037",
      "fix": "KB5009545",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009545",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "18363.2037",
      "fix": "KB5009545",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009545",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for ARM64-based Systems",
      "fixedVersion": "22000.434",
      "fix": "KB5009566",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009566",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for x64-based Systems",
      "fixedVersion": "22000.434",
      "fix": "KB5009566",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009566",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.469",
      "fix": "KB5009555",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009555",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.469",
      "fix": "KB5009555",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009555",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 20H2 (Server Core Installation)",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "RHSA-2021:4059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.15",
      "fix": "curl 7.58.0-2ubuntu3.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-curl-7.58.0-2ubuntu3.15",
      "released": "2021-09-14T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.7",
      "fix": "curl 7.68.0-1ubuntu2.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-curl-7.68.0-1ubuntu2.7",
      "released": "2021-09-14T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.74.0-1.3ubuntu2",
      "fix": "curl 7.74.0-1.3ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-curl-7.74.0-1.3ubuntu2",
      "released": "2021-09-14T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "ol 8",
      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "ELSA-2021-4059",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "RHSA-2021:4059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "ol 8",
      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "ELSA-2021-4059",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "RHSA-2021:4059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
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      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "ELSA-2021-4059",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "RHEL 8",
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      "fix": "RHSA-2021:4059",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
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    {
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      "fixedVersion": "0:7.61.1-18.el8_4.2",
      "fix": "ELSA-2021-4059",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4059",
      "released": "2021-11-02T00:00:00Z"
    },
    {
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      "product": "libcurl3-gnutls",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl3-gnutls-7.58.0-2ubuntu3.15",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl3-gnutls-7.68.0-1ubuntu2.7",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl3-gnutls-7.74.0-1.3ubuntu2",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "libcurl3-nss 7.58.0-2ubuntu3.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl3-nss-7.58.0-2ubuntu3.15",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "release": "Ubuntu 20.04 LTS (focal)",
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      "fix": "libcurl3-nss 7.68.0-1ubuntu2.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl3-nss-7.68.0-1ubuntu2.7",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl3-nss-7.74.0-1.3ubuntu2",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "product": "libcurl4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "libcurl4 7.58.0-2ubuntu3.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl4-7.58.0-2ubuntu3.15",
      "released": "2021-09-14T17:00:00Z"
    },
    {
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      "released": "2021-09-14T17:00:00Z"
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      "released": "2021-09-14T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}