{
  "cveId": "CVE-2020-12403",
  "url": "https://patchblox.com/security/cve/CVE-2020-12403",
  "summary": "CVE-2020-12403 is fixed in 12 products on 1 platform, first by libnss3 2:3.35-2ubuntu2.12, released August 17, 2020. It is not reported as exploited. Patch Radar priority: High.",
  "title": "nss: Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-...",
  "description": "Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications.\n\nSecurity Fix(es):\n\n* nss: Side channel attack on ECDSA signature generation (CVE-2020-6829)\n\n* nss: P-384 and P-521 implementation uses a side-channel vulnerable modular inversion function (CVE-2020-12400)\n\n* nss: CHACHA20-POLY1305 decryption with undersized tag leads to out-of-bounds read (CVE-2020-12403)\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\nBug Fix(es):\n\n* Support key wrap/unwrap with RSA-OAEP (BZ#1896431)\n\n* 1536bit group from RFC3526 is allowed in FIPS mode when in policy DH-MIN is set to be lower than 1536 (BZ#1896432)\n\n* when NSS_SDB_USE_CACHE not set, after curl access https, dentry increase but never released - consider alternative algorithm for benchmarking ACCESS call in sdb_measureAccess [rhel-8] (BZ#1896933)\n\n* Policy should allow overriding library defaults (BZ#1898702)\n\n* KDF-self-tests-induced changes for nss in RHEL 8.4 (BZ#1898953)\n\n* nss: non-blocksize requests to IKEv1 KDF returns bogus output (BZ#1904408)",
  "published": "2020-08-17T20:55:00Z",
  "severity": "Moderate",
  "cvss": 9.1,
  "epss": 0.01541,
  "epssPercentile": 0.75074,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libnss3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2:3.35-2ubuntu2.12",
      "fix": "libnss3 2:3.35-2ubuntu2.12",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss3-2-3.35-2ubuntu2.12",
      "released": "2020-08-17T20:55:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2:3.49.1-1ubuntu1.5",
      "fix": "libnss3 2:3.49.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss3-2-3.49.1-1ubuntu1.5",
      "released": "2020-08-17T20:55:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3-tools",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2:3.35-2ubuntu2.12",
      "fix": "libnss3-tools 2:3.35-2ubuntu2.12",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss3-tools-2-3.35-2ubuntu2.12",
      "released": "2020-08-17T20:55:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3-tools",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2:3.49.1-1ubuntu1.5",
      "fix": "libnss3-tools 2:3.49.1-1ubuntu1.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss3-tools-2-3.49.1-1ubuntu1.5",
      "released": "2020-08-17T20:55:00Z"
    },
    {
      "platform": "linux",
      "product": "nss",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-devel",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-devel",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-freebl",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-freebl",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-freebl-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-softokn-freebl-devel",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-sysinit",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-sysinit",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-tools",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-tools",
      "release": "ol 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nss-util",
      "release": "RHEL 8",
      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
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    {
      "platform": "linux",
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      "fixedVersion": "0:3.53.1-17.el8_3",
      "fix": "ELSA-2021-0538",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
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    {
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      "fix": "RHSA-2021:0538",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-0538",
      "released": "2021-02-16T00:00:00Z"
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    {
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      "url": "https://patchblox.com/security/fix/linux/elsa-2021-0538",
      "released": "2021-02-17T00:00:00Z"
    }
  ],
  "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"
  }
}