{
  "cveId": "CVE-2021-3580",
  "url": "https://patchblox.com/security/cve/CVE-2021-3580",
  "summary": "CVE-2021-3580 is fixed in 12 products on 1 platform, first by libhogweed4 3.4.1-0ubuntu0.18.04.1, released June 9, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "gnutls: The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorit...",
  "description": "The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.\n\nNettle is a cryptographic library that is designed to fit easily in almost any context: In crypto toolkits for object-oriented languages, such as C\u002B\u002B, Python, or Pike, in applications like LSH or GNUPG, or even in kernel space.\n\nThe following packages have been upgraded to a later upstream version: gnutls (3.6.16). (BZ#1956783)\n\nSecurity Fix(es):\n\n* nettle: Remote crash in RSA decryption via manipulated ciphertext (CVE-2021-3580)\n\n* gnutls: Use after free in client key_share extension (CVE-2021-20231)\n\n* gnutls: Use after free in client_send_params in lib/ext/pre_shared_key.c (CVE-2021-20232)\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.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.",
  "published": "2021-06-09T17:00:00Z",
  "severity": "Moderate",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.02708,
  "epssPercentile": 0.86054,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "gnutls",
      "release": "RHEL 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "RHSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls",
      "release": "almalinux 8",
      "fixedVersion": "3.6.16-4.el8",
      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "gnutls",
      "release": "ol 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "ELSA-2021-4451",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4451",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls",
      "release": "rocky 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "RLSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-c\u002B\u002B",
      "release": "RHEL 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "RHSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-c\u002B\u002B",
      "release": "almalinux 8",
      "fixedVersion": "3.6.16-4.el8",
      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-c\u002B\u002B",
      "release": "ol 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "ELSA-2021-4451",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4451",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-dane",
      "release": "RHEL 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "RHSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-dane",
      "release": "almalinux 8",
      "fixedVersion": "3.6.16-4.el8",
      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-dane",
      "release": "ol 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "ELSA-2021-4451",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4451",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "RHSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-devel",
      "release": "almalinux 8",
      "fixedVersion": "3.6.16-4.el8",
      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-devel",
      "release": "ol 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "ELSA-2021-4451",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4451",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-utils",
      "release": "RHEL 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "RHSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-utils",
      "release": "almalinux 8",
      "fixedVersion": "3.6.16-4.el8",
      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "gnutls-utils",
      "release": "ol 8",
      "fixedVersion": "0:3.6.16-4.el8",
      "fix": "ELSA-2021-4451",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4451",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libhogweed4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.1-0ubuntu0.18.04.1",
      "fix": "libhogweed4 3.4.1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libhogweed4-3.4.1-0ubuntu0.18.04.1",
      "released": "2021-06-09T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libhogweed5",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.5.1\u002Breally3.5.1-2ubuntu0.2",
      "fix": "libhogweed5 3.5.1\u002Breally3.5.1-2ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libhogweed5-3.5.1-really3.5.1-2ubuntu0.2",
      "released": "2021-06-09T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnettle6",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "libnettle6 3.4.1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnettle6-3.4.1-0ubuntu0.18.04.1",
      "released": "2021-06-09T17:00:00Z"
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    {
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      "product": "libnettle7",
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      "fixedVersion": "3.5.1\u002Breally3.5.1-2ubuntu0.2",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnettle7-3.5.1-really3.5.1-2ubuntu0.2",
      "released": "2021-06-09T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nettle",
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      "fix": "RHSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nettle",
      "release": "almalinux 8",
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      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "nettle",
      "release": "ol 8",
      "fixedVersion": "0:3.4.1-7.el8",
      "fix": "ELSA-2021-4451",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4451",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nettle",
      "release": "rocky 8",
      "fixedVersion": "0:3.4.1-7.el8",
      "fix": "RLSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
    },
    {
      "platform": "linux",
      "product": "nettle-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.1-0ubuntu0.18.04.1",
      "fix": "nettle-bin 3.4.1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-nettle-bin-3.4.1-0ubuntu0.18.04.1",
      "released": "2021-06-09T17:00:00Z"
    },
    {
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      "product": "nettle-bin",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.5.1\u002Breally3.5.1-2ubuntu0.2",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-nettle-bin-3.5.1-really3.5.1-2ubuntu0.2",
      "released": "2021-06-09T17:00:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4451",
      "released": "2021-11-09T00:00:00Z"
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    {
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      "fix": "ALSA-2021:4451",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4451",
      "released": "2021-11-09T09:23:20Z"
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      "released": "2021-11-16T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}