{
  "cveId": "CVE-2020-12399",
  "url": "https://patchblox.com/security/cve/CVE-2020-12399",
  "summary": "CVE-2020-12399 is fixed in 24 products on 2 platforms, first by libnss3 2:3.35-2ubuntu2.8, released May 25, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Firefox ESR: NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually\u2026",
  "description": "NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This vulnerability affects Thunderbird \u003C 68.9.0, Firefox \u003C 77, and Firefox ESR \u003C 68.9.",
  "published": "2020-05-25T17:00:00Z",
  "severity": "Moderate",
  "cvss": 4.4,
  "epss": 0.00651,
  "epssPercentile": 0.51459,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2020-12399",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (en-US)",
      "fixedVersion": "78.0esr",
      "fix": "Mozilla Firefox ESR (en-US) 78.0esr",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr-78.0esr",
      "released": "2020-06-25T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "77.0.1\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "firefox 77.0.1\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-77.0.1-build1-0ubuntu0.18.04.1",
      "released": "2020-06-02T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "77.0.1\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "firefox 77.0.1\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-77.0.1-build1-0ubuntu0.20.04.1",
      "released": "2020-06-02T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "77.0.1\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "firefox-geckodriver 77.0.1\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-geckodriver-77.0.1-build1-0ubuntu0.18.04.1",
      "released": "2020-06-02T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "77.0.1\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "firefox-geckodriver 77.0.1\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-geckodriver-77.0.1-build1-0ubuntu0.20.04.1",
      "released": "2020-06-02T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "77.0.1\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "firefox-mozsymbols 77.0.1\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-mozsymbols-77.0.1-build1-0ubuntu0.18.04.1",
      "released": "2020-06-02T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "77.0.1\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "firefox-mozsymbols 77.0.1\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-mozsymbols-77.0.1-build1-0ubuntu0.20.04.1",
      "released": "2020-06-02T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2:3.35-2ubuntu2.8",
      "fix": "libnss3 2:3.35-2ubuntu2.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss3-2-3.35-2ubuntu2.8",
      "released": "2020-05-25T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2:3.49.1-1ubuntu1.1",
      "fix": "libnss3 2:3.49.1-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss3-2-3.49.1-1ubuntu1.1",
      "released": "2020-05-25T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3-tools",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2:3.35-2ubuntu2.8",
      "fix": "libnss3-tools 2:3.35-2ubuntu2.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss3-tools-2-3.35-2ubuntu2.8",
      "released": "2020-05-25T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3-tools",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2:3.49.1-1ubuntu1.1",
      "fix": "libnss3-tools 2:3.49.1-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss3-tools-2-3.49.1-1ubuntu1.1",
      "released": "2020-05-25T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nspr",
      "release": "RHEL 8",
      "fixedVersion": "0:4.25.0-2.el8_2",
      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
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    {
      "platform": "linux",
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      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-11.el8_2",
      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-devel",
      "release": "RHEL 8",
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      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-11.el8_2",
      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-11.el8_2",
      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
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    {
      "platform": "linux",
      "product": "nss-softokn-freebl",
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      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-freebl-devel",
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      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
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    {
      "platform": "linux",
      "product": "nss-sysinit",
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      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-tools",
      "release": "RHEL 8",
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      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
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    {
      "platform": "linux",
      "product": "nss-util",
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      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-util-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-11.el8_2",
      "fix": "RHSA-2020:3280",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-3280",
      "released": "2020-08-03T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "thunderbird 1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-1-68.10.0-build1-0ubuntu0.18.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "thunderbird 1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-thunderbird-1-68.10.0-build1-0ubuntu0.20.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-gnome-support",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "thunderbird-gnome-support 1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-68.10.0-build1-0ubuntu0.18.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-gnome-support",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-68.10.0-build1-0ubuntu0.20.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-mozsymbols",
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      "released": "2020-10-08T07:15:00Z"
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    {
      "platform": "linux",
      "product": "thunderbird-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-68.10.0-build1-0ubuntu0.20.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-calendar-timezones",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "xul-ext-calendar-timezones 1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-68.10.0-build1-0ubuntu0.18.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-calendar-timezones",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "xul-ext-calendar-timezones 1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-68.10.0-build1-0ubuntu0.20.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-gdata-provider",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "xul-ext-gdata-provider 1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-68.10.0-build1-0ubuntu0.18.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-gdata-provider",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "fix": "xul-ext-gdata-provider 1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-68.10.0-build1-0ubuntu0.20.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-lightning",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "fix": "xul-ext-lightning 1:68.10.0\u002Bbuild1-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xul-ext-lightning-1-68.10.0-build1-0ubuntu0.18.04.1",
      "released": "2020-10-08T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-lightning",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "fix": "xul-ext-lightning 1:68.10.0\u002Bbuild1-0ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-xul-ext-lightning-1-68.10.0-build1-0ubuntu0.20.04.1",
      "released": "2020-10-08T07:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}