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CVE-2025-22869

Estado: AnalizadaAlta (7.5)—

SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted.

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.

SSH server remoto (AV:N, sin autenticación PR:N) vulnerable a DoS por conexiones lentas que saturan memoria. CWE-770 (asignación excesiva) y descripción confirman denegación de servicio.

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)

GO — SSH

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-22869",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-22869",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-26T14:57:07.968721Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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@golang.org",
      "affectedData": [
        {
          "vendor": "golang.org/x/crypto",
          "product": "golang.org/x/crypto/ssh",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "0.35.0",
              "versionType": "semver"
            }
          ],
          "packageName": "golang.org/x/crypto/ssh",
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "newHandshakeTransport"
            },
            {
              "name": "handshakeTransport.recordWriteError"
            },
            {
              "name": "handshakeTransport.kexLoop"
            },
            {
              "name": "handshakeTransport.writePacket"
            },
            {
              "name": "Client.Dial"
            },
            {
              "name": "Client.DialContext"
            },
            {
              "name": "Client.DialTCP"
            },
            {
              "name": "Client.Listen"
            },
            {
              "name": "Client.ListenTCP"
            },
            {
              "name": "Client.ListenUnix"
            },
            {
              "name": "Client.NewSession"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DiscardRequests"
            },
            {
              "name": "NewClient"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "Request.Reply"
            },
            {
              "name": "Session.Close"
            },
            {
              "name": "Session.CombinedOutput"
            },
            {
              "name": "Session.Output"
            },
            {
              "name": "Session.RequestPty"
            },
            {
              "name": "Session.RequestSubsystem"
            },
            {
              "name": "Session.Run"
            },
            {
              "name": "Session.SendRequest"
            },
            {
              "name": "Session.Setenv"
            },
            {
              "name": "Session.Shell"
            },
            {
              "name": "Session.Signal"
            },
            {
              "name": "Session.Start"
            },
            {
              "name": "Session.WindowChange"
            },
            {
              "name": "channel.Accept"
            },
            {
              "name": "channel.Close"
            },
            {
              "name": "channel.CloseWrite"
            },
            {
              "name": "channel.Read"
            },
            {
              "name": "channel.ReadExtended"
            },
            {
              "name": "channel.Reject"
            },
            {
              "name": "channel.SendRequest"
            },
            {
              "name": "channel.Write"
            },
            {
              "name": "channel.WriteExtended"
            },
            {
              "name": "connection.SendAuthBanner"
            },
            {
              "name": "curve25519sha256.Client"
            },
            {
              "name": "curve25519sha256.Server"
            },
            {
              "name": "dhGEXSHA.Client"
            },
            {
              "name": "dhGEXSHA.Server"
            },
            {
              "name": "dhGroup.Client"
            },
            {
              "name": "dhGroup.Server"
            },
            {
              "name": "ecdh.Client"
            },
            {
              "name": "ecdh.Server"
            },
            {
              "name": "extChannel.Read"
            },
            {
              "name": "extChannel.Write"
            },
            {
              "name": "mux.OpenChannel"
            },
            {
              "name": "mux.SendRequest"
            },
            {
              "name": "sessionStdin.Close"
            },
            {
              "name": "sshClientKeyboardInteractive.Challenge"
            },
            {
              "name": "tcpListener.Accept"
            },
            {
              "name": "tcpListener.Close"
            },
            {
              "name": "unixListener.Accept"
            },
            {
              "name": "unixListener.Close"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-02-26T08:14:24.997",
  "references": [
    {
      "url": "https://go.dev/cl/652135",
      "tags": [
        "Patch"
      ],
      "source": "security@golang.org"
    },
    {
      "url": "https://go.dev/issue/71931",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "source": "security@golang.org"
    },
    {
      "url": "https://pkg.go.dev/vuln/GO-2025-3487",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@golang.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20250411-0010/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted."
    },
    {
      "lang": "es",
      "value": "Los servidores SSH que implementan protocolos de transferencia de archivos son vulnerables a un ataque de denegación de servicio por parte de clientes que completan el intercambio de claves lentamente o no lo completan en absoluto, lo que provoca que el contenido pendiente se lea en la memoria, pero nunca se transmita."
    }
  ],
  "lastModified": "2026-06-17T08:50:40.113",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:go:ssh:*:*:*:*:*:go:*:*",
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              "versionEndExcluding": "0.35.0"
            }
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          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "security@golang.org"
}