SIPGO library has response DoS vulnerability via nil pointer dereference

{
  "id": "159e80fdeb1f403655a0e8c1f9913557bf1a6f5f8f4526d2c41b91f1df2da0e4",
  "url": "https://osv.dev/vulnerability/CVE-2025-68274",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SIPGO library has response DoS vulnerability via nil pointer dereference",
    "summary": "SIPGO is a library for writing SIP services in the GO language. Starting in version 0.3.0 and prior to version 1.0.0-alpha-1, a nil pointer dereference vulnerability is in the SIPGO library's `NewResponseFromRequest` function that affects all normal SIP operations. The vulnerability allows remote attackers to crash any SIP application by sending a single malformed SIP request without a To header. The vulnerability occurs when SIP message parsing succeeds for a request missing the To header, but the response creation code assumes the To header exists without proper nil checks. This affects routine operations like call setup, authentication, and message handling - not just error cases. This vulnerability affects all SIP applications using the sipgo library, not just specific configurations or edge cases, as long as they make use of the `NewResponseFromRequest` function. Version 1.0.0-alpha-1 contains a patch for the issue.",
    "evidence": "osv:CVE-2025-68274",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-68274",
      "aliases": [
        "CVE-2025-68274",
        "GHSA-c623-f998-8hhv",
        "GO-2025-4244"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/emiago/sipgo",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6ffeb52b05766d9a39dfe23b08bfd07029d79dfe"
                },
                {
                  "fixed": "ae239324512644ea045cb19b3bc1deb3871476cd"
                },
                {
                  "fixed": "dc9669364a154ec6d134e542f6a63c31b5afe6e8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:emiago:sipgo:*:*:*:*:*:go:*:*",
                    "range": [
                      {
                        "introduced": "0.30.0"
                      },
                      {
                        "fixed": "1.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "dc9669364a154ec6d134e542f6a63c31b5afe6e8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.0-alpha",
            "v0.33.0",
            "v0.32.1",
            "v0.32.0",
            "v0.31.0",
            "v0.30.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68274.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.942113812Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68274.json",
        "https://github.com/emiago/sipgo/security/advisories/GHSA-c623-f998-8hhv",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68274",
        "https://github.com/emiago/sipgo/commit/dc9669364a154ec6d134e542f6a63c31b5afe6e8"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-476",
          "CWE-755"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68274.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68274",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503206,
  "published_at": "2025-12-16T22:02:55.36+00:00"
}