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CVE-2025-27421

Estado: AplazadaAlta (7.5)—

Abacus is a highly scalable and stateless counting API. A critical goroutine leak vulnerability has been identified in the Abacus server's Server-Sent Events (SSE) implementation. The issue occurs when clients disconnect from the /stream endpoint, as the server fails to properly clean up resources and terminate associated goroutines. This leads to resource exhaustion where the server continues running but eventually stops accepting new SSE connections while maintaining high memory usage. The vulnerability specifically involves improper channel cleanup in the event handling mechanism, causing goroutines to remain blocked indefinitely. This vulnerability is fixed in 1.4.0.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Servidor de aplicación expuesto (AV:N, PR:N) con fuga de goroutines en /stream que agota recursos y rechaza conexiones: DoS de aplicación típico.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Abacus — AbacusAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-27421",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-27421",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-03-03T16:40:35.160534Z"
        }
      }
    ],
    "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
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "JasonLovesDoggo",
          "product": "abacus",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.4.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-03-03T17:15:15.630",
  "references": [
    {
      "url": "https://github.com/JasonLovesDoggo/abacus/commit/898ff1204e11317cc161240b660e63eed5a72b33",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/JasonLovesDoggo/abacus/security/advisories/GHSA-vh64-54px-qgf8",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-772"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Abacus is a highly scalable and stateless counting API. A critical goroutine leak vulnerability has been identified in the Abacus server's Server-Sent Events (SSE) implementation. The issue occurs when clients disconnect from the /stream endpoint, as the server fails to properly clean up resources and terminate associated goroutines. This leads to resource exhaustion where the server continues running but eventually stops accepting new SSE connections while maintaining high memory usage. The vulnerability specifically involves improper channel cleanup in the event handling mechanism, causing goroutines to remain blocked indefinitely. This vulnerability is fixed in 1.4.0."
    },
    {
      "lang": "es",
      "value": "Abacus es una API de conteo altamente escalable y sin estado. Se ha identificado una vulnerabilidad crítica de fuga de goroutines en la implementación de eventos enviados por el servidor (SSE) del servidor Abacus. El problema ocurre cuando los clientes se desconectan del endpoint /stream, ya que el servidor no depura adecuadamente los recursos ni termina los goroutines asociados. Esto provoca el agotamiento de los recursos, donde el servidor continúa ejecutándose pero finalmente deja de aceptar nuevas conexiones SSE mientras mantiene un alto uso de memoria. La vulnerabilidad involucra específicamente una limpieza de canal incorrecta en el mecanismo de gestión de eventos, lo que hace que los goroutines permanezcan bloqueados indefinidamente. Esta vulnerabilidad se solucionó en 1.4.0."
    }
  ],
  "lastModified": "2026-06-17T09:03:33.370",
  "sourceIdentifier": "security-advisories@github.com"
}