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CVE-2018-5455

Status: ModifiedCritical (9.8)—

A Reliance on Cookies without Validation and Integrity Checking issue was discovered in Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior. The application allows a cookie parameter to consist of only digits, allowing an attacker to perform a brute force attack bypassing authentication and gaining access to device functions.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (4)

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2018-5455",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": true,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 3.9
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  "affected": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Moxa OnCell G3100-HSPA Series",
          "versions": [
            {
              "status": "affected",
              "version": "Moxa OnCell G3100-HSPA Series"
            }
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  ],
  "published": "2018-03-05T17:29:00.613",
  "references": [
    {
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-060-02",
      "tags": [
        "Patch",
        "Third Party Advisory",
        "US Government Resource"
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      "source": "ics-cert@hq.dhs.gov"
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    {
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-060-02",
      "tags": [
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        "Third Party Advisory",
        "US Government Resource"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "ics-cert@hq.dhs.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-565"
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
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  ],
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    {
      "lang": "en",
      "value": "A Reliance on Cookies without Validation and Integrity Checking issue was discovered in Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior. The application allows a cookie parameter to consist of only digits, allowing an attacker to perform a brute force attack bypassing authentication and gaining access to device functions."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema de dependencia en cookies sin comprobación de validación e integridad en Moxa OnCell G3100-HSPA Series en versiones 1.4 Build 16062919 y anteriores. La aplicación permite que un parámetro de la cookie consista solo de dígitos, lo que permite que un atacante realice un ataque de fuerza bruta que omita la autenticación y obtenga acceso a las funciones del dispositivo."
    }
  ],
  "lastModified": "2026-06-17T02:00:20.917",
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