{
  "cveId": "CVE-2018-18508",
  "url": "https://patchblox.com/security/cve/CVE-2018-18508",
  "summary": "CVE-2018-18508 is fixed in 14 products on 1 platform, first by libnss3 2:3.35-2ubuntu2.2, released December 30, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "nspr: 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\nNetscape Portable Runtime (NSPR) provides platform independence for non-GUI operating system facilities.\n\nThe following packages have been upgraded to a later upstream version: nss (3.44.0), nspr (4.21.0). (BZ#1713187, BZ#1713188)\n\nSecurity Fix(es):\n\n* nss: NULL pointer dereference in several CMS functions resulting in a denial of service (CVE-2018-18508)\n\n* nss: Out-of-bounds read when importing curve25519 private key (CVE-2019-11719)\n\n* nss: Empty or malformed p256-ECDH public keys may trigger a segmentation fault (CVE-2019-11729)\n\n* nss: PKCS#1 v1.5 signatures can be used for TLS 1.3 (CVE-2019-11727)\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* PQG verify fails when create DSA PQG parameters because the counts aren\u0027t returned correctly. (BZ#1685325)\n\n* zeroization of AES context missing (BZ#1719629)\n\n* RSA Pairwise consistency test (BZ#1719630)\n\n* FIPS updated for nss-softoken POST (BZ#1722373)\n\n* DH/ECDH key tests missing for the PG parameters (BZ#1722374)\n\n* NSS should implement continuous random test on it\u0027s seed data or use the kernel AF_ALG interface for random (BZ#1725059)\n\n* support setting supported signature algorithms in strsclnt utility (BZ#1725110)\n\n* certutil -F with no parameters is killed with segmentation fault message (BZ#1725115)\n\n* NSS: Support for IKE/IPsec typical PKIX usage so libreswan can use nss without rejecting certs based on EKU (BZ#1725116)\n\n* NSS should use getentropy() for seeding its RNG, not /dev/urandom. Needs update to NSS 3.37 (BZ#1725117)\n\n* Disable TLS 1.3 in FIPS mode (BZ#1725773)\n\n* Wrong alert sent when client uses PKCS#1 signatures in TLS 1.3 (BZ#1728259)\n\n* x25519 allowed in FIPS mode (BZ#1728260)\n\n* post handshake authentication with selfserv does not work if SSL_ENABLE_SESSION_TICKETS is set (BZ#1728261)\n\nEnhancement(s):\n\n* Move IKEv1 and IKEv2 KDF\u0027s from libreswan to nss-softkn (BZ#1719628)",
  "published": "2018-12-30T16:00:00Z",
  "severity": "Moderate",
  "cvss": 6.5,
  "epss": 0.01971,
  "epssPercentile": 0.80502,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libnss3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2:3.35-2ubuntu2.2",
      "fix": "libnss3 2:3.35-2ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss3-2-3.35-2ubuntu2.2",
      "released": "2018-12-30T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss3-tools",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2:3.35-2ubuntu2.2",
      "fix": "libnss3-tools 2:3.35-2ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss3-tools-2-3.35-2ubuntu2.2",
      "released": "2018-12-30T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nspr",
      "release": "RHEL 8",
      "fixedVersion": "0:4.21.0-2.el8_0",
      "fix": "RHSA-2019:1951",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-1951",
      "released": "2019-07-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nspr",
      "release": "ol 8",
      "fixedVersion": "0:4.21.0-2.el8_0",
      "fix": "ELSA-2019-1951",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-1951",
      "released": "2019-08-05T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nspr-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.21.0-2.el8_0",
      "fix": "RHSA-2019:1951",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-1951",
      "released": "2019-07-30T00:00:00Z"
    },
    {
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      "product": "nspr-devel",
      "release": "ol 8",
      "fixedVersion": "0:4.21.0-2.el8_0",
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    {
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      "fixedVersion": "0:3.44.0-7.el8_0",
      "fix": "RHSA-2019:1951",
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    },
    {
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      "fix": "ELSA-2019-1951",
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      "released": "2019-08-05T00:00:00Z"
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    {
      "platform": "linux",
      "product": "nss-softokn",
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      "fix": "RHSA-2019:1951",
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      "released": "2019-07-30T00:00:00Z"
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      "fix": "ELSA-2019-1951",
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      "released": "2019-08-05T00:00:00Z"
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    {
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      "fix": "RHSA-2019:1951",
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    {
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      "product": "nss-softokn-freebl",
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      "fix": "ELSA-2019-1951",
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}