« Back to list

CVE-2012-4651

Status: ModifiedMedium (4.3)—

Cisco IOS before 15.3(2)T, when scansafe is enabled, allows remote attackers to cause a denial of service (latency) via SYN packets that are not accompanied by SYN-ACK packets from the Scan Safe Tower, aka Bug ID CSCub85451.

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 (1)

Cisco — IOS

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2012-4651",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "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": "2014-04-23T11:52:59.133",
  "references": [
    {
      "url": "http://www.cisco.com/c/en/us/td/docs/ios/15_3m_and_t/release/notes/15_3m_and_t.pdf",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.cisco.com/c/en/us/td/docs/ios/15_3m_and_t/release/notes/15_3m_and_t.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cisco IOS before 15.3(2)T, when scansafe is enabled, allows remote attackers to cause a denial of service (latency) via SYN packets that are not accompanied by SYN-ACK packets from the Scan Safe Tower, aka Bug ID CSCub85451."
    },
    {
      "lang": "es",
      "value": "Cisco IOS anterior a 15.3(2)T, cuando scansafe está habilitado, permite a atacantes remotos causar una denegación de servicio (latencia) a través de paquetes SYN que no están acompañados por paquetes SYN-ACK del Scan Safe Tower, también conocido como Bug ID CSCub85451."
    }
  ],
  "lastModified": "2026-06-16T23:45:31.497",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "95F64BFE-7830-4547-9F23-CC818A83FABC",
              "versionEndIncluding": "15.3\\(3\\)m2"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B870F917-9F35-41AE-8CCA-D8574189C7EC"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3\\(2\\)s:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "36979139-66D2-40DD-A865-547BA9D49786"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3\\(3\\)m:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6E0A47B7-5AD3-4B4C-A2FD-4EE0381B3FCE"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3\\(3\\)m1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "499C6196-2D34-4312-9C3E-B1A6E8D21112"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3\\(3\\)s:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AB84CE04-F2D0-4A37-B2BA-25126D1824D8"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3s:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2D105A75-3C37-4B44-8248-6037C98F2F93"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}