Security advisory

{
  "id": "6c66b39ed3af6cda99c4a90a5ec6b282c954a402ab4f64b2d9ce6da7f3b76397",
  "url": "https://osv.dev/vulnerability/CVE-2018-1000654",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-1000654",
    "summary": "GNU Libtasn1-4.13 libtasn1-4.13 version libtasn1-4.13, libtasn1-4.12 contains a DoS, specifically CPU usage will reach 100% when running asn1Paser against the POC due to an issue in _asn1_expand_object_id(p_tree), after a long time, the program will be killed. This attack appears to be exploitable via parsing a crafted file.",
    "evidence": "osv:CVE-2018-1000654",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-1000654",
      "aliases": [
        "CVE-2018-1000654"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gnutls/libtasn1",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4bc67882e72929732b1d9cccc73e606f3a44f542"
                },
                {
                  "last_affected": "946565d8eb05fbf7970ea366e817581bb5a90910"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:libtasn1:4.12:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.12"
                      },
                      {
                        "last_affected": "4.12"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:gnu:libtasn1:4.13:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.13"
                      },
                      {
                        "last_affected": "4.13"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.12",
            "4.13",
            "libtasn1_4_13",
            "libtasn1_4_12"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1000654.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:14.942893907Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E",
        "https://gitlab.com/gnutls/libtasn1/issues/4"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-1000654",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381444,
  "published_at": "2018-08-20T19:31:44.87+00:00"
}