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Security advisory

Type: advisorySources: OSVCVE: CVE-2019-12312

In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normallly expected IKE_AUTH exchange. This affects send_v2N_spi_response_from_state() in programs/pluto/ikev2_send.c that will then trigger a NULL pointer dereference leading to a restart of libreswan.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2019-12312
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 10:33 UTC · Revision 1

Source evidence

CVE-2019-12312

core-osv · Original source

Published 24 May 2019, 14:29 UTC

In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normallly expected IKE_AUTH exchange. This affects send_v2N_spi_response_from_state() in programs/pluto/ikev2_send.c that will then trigger a NULL pointer dereference leading to a restart of libreswan.

osv:CVE-2019-12312
Complete source record
{
  "id": "bd4a79d55befa63eaeb8e709a58a3cd762ca29a17ea35337e897961f0683dd4c",
  "url": "https://osv.dev/vulnerability/CVE-2019-12312",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-12312",
    "summary": "In Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IKEv2 IKE_SA_INIT exchange, followed by a bogus INFORMATIONAL exchange instead of the normallly expected IKE_AUTH exchange. This affects send_v2N_spi_response_from_state() in programs/pluto/ikev2_send.c that will then trigger a NULL pointer dereference leading to a restart of libreswan.",
    "evidence": "osv:CVE-2019-12312",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-12312",
      "aliases": [
        "CVE-2019-12312"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libreswan/libreswan",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3897683ffe3597b9e57041876c88de73dc2d04cf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.28"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.27",
            "v3.26",
            "v3.25",
            "v3.22",
            "v3.22dr1",
            "v3.21",
            "v3.20",
            "v3.21rc5",
            "v3.20dr4",
            "v3.20dr3",
            "v3.19",
            "v3.18",
            "v3.18dr2",
            "v3.16",
            "v3.17",
            "v3.16rc3",
            "v3.16rc2",
            "v3.14",
            "v3.14rc3",
            "v3.14rc2",
            "v3.7",
            "v3.6",
            "v3.5",
            "v3.4",
            "v3.3",
            "v3.1",
            "v3.11dr1",
            "v3.2rc1",
            "v2.93",
            "v2.92",
            "libreswan-0.0.1",
            "0.9.9",
            "v2.6.38",
            "v2.6.38rc2",
            "v2.6.38rc1",
            "v2.6.38dr2",
            "v2.6.32",
            "v2.6.37",
            "v2.6.36",
            "v2.6.36rc1",
            "v2.6.36dr1",
            "v2.6.35dr1",
            "v2.6.34",
            "v2.6.34rc6",
            "v2.6.34rc5",
            "v2.6.34rc2",
            "v2.6.34rc1",
            "v2.6.34dr2",
            "v2.6.34dr1",
            "v2.6.33rc1",
            "v2.6.33dr2",
            "v2.6.32rc9",
            "v2.6.32rc8",
            "v2.6.32rc7",
            "v2.6.32rc6",
            "v2.6.32rc5",
            "v2.6.32rc3",
            "v2.6.32rc1",
            "v2.6.32dr5",
            "v2.6.32dr4",
            "v2.6.32dr3",
            "v2.6.32dr1",
            "v2.6.29rc2",
            "v2.6.29",
            "v2.6.28dr1",
            "v2.6.27dr1",
            "v2.6.26",
            "v2.6.26rc1",
            "v2.6.24",
            "v2.6.24rc5",
            "v2.6.24rc4",
            "v2.6.24rc3",
            "v2.6.24rc2",
            "v2.6.23",
            "v2.6.23dr1",
            "v2.6.22dr1",
            "v2.6.21",
            "v2.6.20bis",
            "v2.6.20rc2",
            "v2.6.20",
            "v2.6.19",
            "v2.6.18",
            "v2.6.18rc1",
            "v2.6.16",
            "v2.6.16dr5",
            "v2.6.16dr4",
            "v2.6.16dr3",
            "v2.6.16dr2",
            "v2.6.16dr1",
            "v2.6.15",
            "v2.6.15dr2",
            "v2.6.14",
            "v2.6.07",
            "v2.6.03",
            "v2.6.01",
            "v2.5.03",
            "v2.5.01",
            "pre_FreeBSD_merge_200607"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12312.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:39.675149802Z",
      "provider": "osv",
      "references": [
        "https://libreswan.org/security/CVE-2019-12312/CVE-2019-12312.txt",
        "https://libreswan.org/security/CVE-2019-12312/libreswan-3.27-CVE-2019-12312.patch",
        "https://github.com/libreswan/libreswan/issues/246",
        "https://github.com/libreswan/libreswan/compare/9b1394e...3897683"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-12312",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381967,
  "published_at": "2019-05-24T14:29:00.23+00:00"
}