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CVE-2016-1335

Status: ModifiedHigh (7.5)—

The SSH implementation in Cisco StarOS before 19.3.M0.62771 and 20.x before 20.0.M0.62768 on ASR 5000 devices mishandles a multi-user public-key authentication configuration, which allows remote authenticated users to gain privileges by establishing a connection from an endpoint that was previously used for an administrator's connection, aka Bug ID CSCux22492.

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 — ASR 5000 Series Software

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2016-1335",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.1,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2016-02-19T19:59:03.157",
  "references": [
    {
      "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160218-asr",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1035062",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160218-asr",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1035062",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The SSH implementation in Cisco StarOS before 19.3.M0.62771 and 20.x before 20.0.M0.62768 on ASR 5000 devices mishandles a multi-user public-key authentication configuration, which allows remote authenticated users to gain privileges by establishing a connection from an endpoint that was previously used for an administrator's connection, aka Bug ID CSCux22492."
    },
    {
      "lang": "es",
      "value": "La implementación de SSH en Cisco StarOS en versiones anteriores a 19.3.M0.62771 y 20.x en versiones anteriores a 20.0.M0.62768 en dispositivos ASR 5000 no maneja correctamente una configuración de autenticación de clave pública multi usuario, lo que permite a usuarios remotos autenticados obtener privilegios estableciendo una conexión desde un dispositivo final que fue previamente utilizado para la conexión de un administrador, también conocida como Bug ID CSCux22492."
    }
  ],
  "lastModified": "2026-06-17T00:41:44.117",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cisco:asr_5000_series_software:16.5.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3D18BFD5-58FB-4C50-894C-31908072A80E"
            },
            {
              "criteria": "cpe:2.3:a:cisco:asr_5000_series_software:17.7.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "21450C55-122F-47D9-BE78-C4514D9CEB27"
            },
            {
              "criteria": "cpe:2.3:a:cisco:asr_5000_series_software:18.4.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "91A9DF64-3AF6-4DA7-B97C-34D8D502C4E1"
            },
            {
              "criteria": "cpe:2.3:a:cisco:asr_5000_series_software:19.0.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "701EB7E5-C0D8-4946-AECD-276131896091"
            },
            {
              "criteria": "cpe:2.3:a:cisco:asr_5000_series_software:19.3.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B1938A8E-8DAC-43FA-98C8-8BBEC8061701"
            },
            {
              "criteria": "cpe:2.3:a:cisco:asr_5000_series_software:20.0.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BCE327B4-D5D7-48CD-81CE-2729CA9DC7D2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}