gsd-2021-1356
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection.
Aliases
Aliases
CVE-2021-1356


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-1356",
    "description": "Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection.",
    "id": "GSD-2021-1356"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-1356"
      ],
      "details": "Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection.",
      "id": "GSD-2021-1356",
      "modified": "2023-12-13T01:23:23.010633Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "psirt@cisco.com",
        "DATE_PUBLIC": "2021-03-24T16:00:00",
        "ID": "CVE-2021-1356",
        "STATE": "PUBLIC",
        "TITLE": "Cisco IOS XE Software Web UI Denial of Service Vulnerabilities"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
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                  {
                    "product_name": "Cisco IOS XE Software ",
                    "version": {
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                        {
                          "version_value": "n/a"
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          }
        ]
      },
      "exploit": [
        {
          "lang": "eng",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory. "
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      "impact": {
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          "baseScore": "4.3",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L ",
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                "value": "CWE-20"
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          {
            "name": "20210324 Cisco IOS XE Software Web UI Denial of Service Vulnerabilities",
            "refsource": "CISCO",
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn"
          }
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        "defect": [
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        "discovery": "INTERNAL"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
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                "cpe_name": [],
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                "cpe_name": [],
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                "cpe_name": [],
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              {
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                "cpe_name": [],
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              {
                "cpe23Uri": "cpe:2.3:o:cisco:ios_xe:17.2.2:*:*:*:*:*:*:*",
                "cpe_name": [],
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              {
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                "cpe_name": [],
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          "ID": "CVE-2021-1356"
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        "data_version": "4.0",
        "description": {
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            {
              "lang": "en",
              "value": "Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection."
            }
          ]
        },
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                  "value": "CWE-755"
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        },
        "references": {
          "reference_data": [
            {
              "name": "20210324 Cisco IOS XE Software Web UI Denial of Service Vulnerabilities",
              "refsource": "CISCO",
              "tags": [
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              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-z9yqYQAn"
            }
          ]
        }
      },
      "impact": {
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          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 3.5,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:S/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 6.8,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
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          },
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          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2021-03-29T16:19Z",
      "publishedDate": "2021-03-24T21:15Z"
    }
  }
}


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