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CVE-2008-3812

Status: ModifiedHigh (7.1)—
Severity7.1High · CVSS 2.0
Exploitation probability2.78 %higher than 86% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Cisco IOS 12.4, when IOS firewall Application Inspection Control (AIC) with HTTP Deep Packet Inspection is enabled, allows remote attackers to cause a denial of service (device reload) via a malformed HTTP transit packet.

CVSS

Base score
7.1
Version
2.0
Vector
AV:N/AC:M/Au:N/C:N/I:N/A:C

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
2.78 %
Percentile among all scored CVEs
86
Score date
10/22/2026

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 (1)

Cisco — IOS

CWEs

References

Show 14 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2008-3812",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.1,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2008-09-26T16:21:44.347",
  "references": [
    {
      "url": "http://secunia.com/advisories/31990",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://tools.cisco.com/security/center/viewAlert.x?alertId=16661",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01545.shtml",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/31354",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securitytracker.com/id?1020929",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2008/2670",
      "tags": [
        "Permissions Required"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5302",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://secunia.com/advisories/31990",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://tools.cisco.com/security/center/viewAlert.x?alertId=16661",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01545.shtml",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/31354",
      "tags": [
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        "VDB Entry"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id?1020929",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2008/2670",
      "tags": [
        "Permissions Required"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5302",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cisco IOS 12.4, when IOS firewall Application Inspection Control (AIC) with HTTP Deep Packet Inspection is enabled, allows remote attackers to cause a denial of service (device reload) via a malformed HTTP transit packet."
    },
    {
      "lang": "es",
      "value": "En Cisco IOS v12.4, cuando la Aplicación de Control de Inspección (AIC) del cortafuegos IOS  con  Inspección de Profundidad de Paquete HTTP está habilitada, permite a atacantes remotos causar denegación del servicio (reinicio de dispositivo) a través de paquetes de tránsito HTTP malformados."
    }
  ],
  "lastModified": "2026-06-16T22:56:35.310",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BEAD7398-D1B2-47FB-952D-8C3162D5A363"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4xe:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C1F36C3D-E9A2-41A1-BE71-4D8B00D228E0"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4xj:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BF610051-1638-4C1B-9864-11E34EFC4DE6"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4xk:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "78260223-50C0-48F8-9A65-AE67489E602C"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4xv:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "883FA166-2973-42BA-842D-28FBDBFEAC4A"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4xw:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4362045B-7065-4FF9-A977-B3DA7894F831"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}