{
  "id": "CVE-2021-25677",
  "sourceIdentifier": "productcert@siemens.com",
  "published": "2021-04-22T21:15:10.207",
  "lastModified": "2024-11-21T05:55:16.807",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), SIMOTICS CONNECT 400 (All versions >= V0.5.0.0 < V1.0.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS client does not properly randomize DNS transaction IDs. That could allow an attacker to poison the DNS cache or spoof DNS resolving."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a la versi\u00f3n V2017.02.3), Nucleus ReadyStart V4 (Todas las versiones anteriores a la versi\u00f3n V4.1.0), Nucleus Source Code (Versiones que incluyen los m\u00f3dulos DNS afectados), SIMOTICS CONNECT 400 (Todas las versiones anteriores a la versi\u00f3n V0.5.0.0), SIMOTICS CONNECT 400 (Todas las versiones posteriores o iguales a la versi\u00f3n V0.5.0.0 anteriores a la versi\u00f3n V1.0.0). El cliente DNS no aleatoriza correctamente los ID de las transacciones DNS. Esto podr\u00eda permitir a un atacante envenenar la cach\u00e9 DNS o falsificar la resoluci\u00f3n DNS"
    }
  ],
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          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
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        "exploitabilityScore": 3.9,
        "impactScore": 1.4
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        "type": "Primary",
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          "authentication": "NONE",
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  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf",
      "source": "productcert@siemens.com"
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