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CVE-2023-27599

Estado: ModificadaAlta (7.5)—

OpenSIPS es una implementación de servidor del protocolo de inicio de sesión (SIP, Session Initiation Protocol). Antes de las versiones 3.1.7 y 3.2.4, cuando la función `append_hf` procesa un mensaje SIP con una cabecera To mal formada, se realiza una llamada a la función `abort()`, lo que provoca un fallo (caída) del programa. Esto se debe a la siguiente comprobación en `data_lump.c:399` en la función `anchor_lump`. Un atacante que aproveche esta vulnerabilidad provocará la caída de OpenSIPS, lo que conlleva una denegación de servicio. Afecta a las configuraciones que contienen funciones que hacen uso del código afectado, como la función `append_hf`. Este problema se ha corregido en las versiones 3.1.7 y 3.2.4.

Traducción automática del texto original de NVD (en inglés).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Opensips — Opensips

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-27599",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-27599",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-25T14:30:52.411436Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "OpenSIPS",
          "product": "opensips",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.1.7"
            },
            {
              "status": "affected",
              "version": ">= 3.2.0, < 3.2.4"
            }
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  ],
  "published": "2023-03-15T21:15:09.247",
  "references": [
    {
      "url": "https://github.com/OpenSIPS/opensips/commit/cb56694d290530ac308f44b453c18120b1c1109d",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-qvj2-vqrg-f5jx",
      "tags": [
        "Third Party Advisory"
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      "source": "security-advisories@github.com"
    },
    {
      "url": "https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf",
      "tags": [
        "Third Party Advisory"
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      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/OpenSIPS/opensips/commit/cb56694d290530ac308f44b453c18120b1c1109d",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-qvj2-vqrg-f5jx",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, when the function `append_hf` handles a SIP message with a malformed To header, a call to the function `abort()` is performed, resulting in a crash. This is due to the following check in `data_lump.c:399` in the function `anchor_lump`. An attacker abusing this vulnerability will crash OpenSIPS leading to Denial of Service. It affects configurations containing functions that make use of the affected code, such as the function `append_hf`. This issue has been fixed in versions 3.1.7 and 3.2.4."
    }
  ],
  "lastModified": "2026-06-17T05:45:33.433",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "3.1.7"
            },
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              "matchCriteriaId": "34713A76-CAED-43CF-A77C-73F1C36208AA",
              "versionEndExcluding": "3.2.4",
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          "operator": "OR"
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  "sourceIdentifier": "security-advisories@github.com"
}