Vulnerability-Lookup

CNVD-2021-09295

Vulnerability from cnvd - Published: 2021-02-05

Title

Cisco IOS XR拒绝服务漏洞（CNVD-2021-09295）

Description

Cisco IOS XR软件是用于服务提供商网络的模块化和完全分布式的网络操作系统。 Cisco IOS XR的IPv6协议处理存在拒绝服务漏洞。该漏洞源于该软件未正确转发具有IPv6节点本地多播组地址目标并在管理界面上接收的IPv6数据包。攻击者可利用该漏洞导致网络性能下降或拒绝服务。

Severity

中

Patch Name

Cisco IOS XR拒绝服务漏洞（CNVD-2021-09295）的补丁

Patch Description

Cisco IOS XR软件是用于服务提供商网络的模块化和完全分布式的网络操作系统。 Cisco IOS XR的IPv6协议处理存在拒绝服务漏洞。该漏洞源于该软件未正确转发具有IPv6节点本地多播组地址目标并在管理界面上接收的IPv6数据包。攻击者可利用该漏洞导致网络性能下降或拒绝服务。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xripv6-spJem78K

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-1268

Impacted products

Name
Cisco IOS XR

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-1268",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-1268"
    }
  },
  "description": "Cisco IOS XR\u8f6f\u4ef6\u662f\u7528\u4e8e\u670d\u52a1\u63d0\u4f9b\u5546\u7f51\u7edc\u7684\u6a21\u5757\u5316\u548c\u5b8c\u5168\u5206\u5e03\u5f0f\u7684\u7f51\u7edc\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nCisco IOS XR\u7684IPv6\u534f\u8bae\u5904\u7406\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8be5\u8f6f\u4ef6\u672a\u6b63\u786e\u8f6c\u53d1\u5177\u6709IPv6\u8282\u70b9\u672c\u5730\u591a\u64ad\u7ec4\u5730\u5740\u76ee\u6807\u5e76\u5728\u7ba1\u7406\u754c\u9762\u4e0a\u63a5\u6536\u7684IPv6\u6570\u636e\u5305\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7f51\u7edc\u6027\u80fd\u4e0b\u964d\u6216\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xripv6-spJem78K",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-09295",
  "openTime": "2021-02-05",
  "patchDescription": "Cisco IOS XR\u8f6f\u4ef6\u662f\u7528\u4e8e\u670d\u52a1\u63d0\u4f9b\u5546\u7f51\u7edc\u7684\u6a21\u5757\u5316\u548c\u5b8c\u5168\u5206\u5e03\u5f0f\u7684\u7f51\u7edc\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nCisco IOS XR\u7684IPv6\u534f\u8bae\u5904\u7406\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8be5\u8f6f\u4ef6\u672a\u6b63\u786e\u8f6c\u53d1\u5177\u6709IPv6\u8282\u70b9\u672c\u5730\u591a\u64ad\u7ec4\u5730\u5740\u76ee\u6807\u5e76\u5728\u7ba1\u7406\u754c\u9762\u4e0a\u63a5\u6536\u7684IPv6\u6570\u636e\u5305\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7f51\u7edc\u6027\u80fd\u4e0b\u964d\u6216\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Cisco IOS XR\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-09295\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco IOS XR"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-1268",
  "serverity": "\u4e2d",
  "submitTime": "2021-02-04",
  "title": "Cisco IOS XR\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-09295\uff09"
}

CVE-2021-1268 (GCVE-0-2021-1268)

Vulnerability from cvelistv5 – Published: 2021-02-04 16:35 – Updated: 2024-11-08 23:54

Title

Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability

Summary

A vulnerability in the IPv6 protocol handling of the management interfaces of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause an IPv6 flood on the management interface network of an affected device. The vulnerability exists because the software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. An attacker could exploit this vulnerability by connecting to the same network as the management interfaces and injecting IPv6 packets that have an IPv6 node-local multicast group address destination. A successful exploit could allow the attacker to cause an IPv6 flood on the corresponding network. Depending on the number of Cisco IOS XR Software nodes on that network segment, exploitation could cause excessive network traffic, resulting in network degradation or a denial of service (DoS) condition.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-08 20:49 UTC

CWE

CWE-1076

Assigner

cisco mitre root Scorecard

References

1 reference

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco IOS XR Software	Affected: n/a

Date Public

2021-02-03 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T16:02:56.375Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20210203 Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xripv6-spJem78K"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-1268",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-08T20:49:57.430099Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-08T23:54:23.194Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco IOS XR Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2021-02-03T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the IPv6 protocol handling of the management interfaces of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause an IPv6 flood on the management interface network of an affected device. The vulnerability exists because the software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. An attacker could exploit this vulnerability by connecting to the same network as the management interfaces and injecting IPv6 packets that have an IPv6 node-local multicast group address destination. A successful exploit could allow the attacker to cause an IPv6 flood on the corresponding network. Depending on the number of Cisco IOS XR Software nodes on that network segment, exploitation could cause excessive network traffic, resulting in network degradation or a denial of service (DoS) condition."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1076",
              "description": "CWE-1076",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-04T16:35:25.000Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20210203 Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xripv6-spJem78K"
        }
      ],
      "source": {
        "advisory": "cisco-sa-xripv6-spJem78K",
        "defect": [
          [
            "CSCvv45504"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2021-02-03T16:00:00",
          "ID": "CVE-2021-1268",
          "STATE": "PUBLIC",
          "TITLE": "Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Cisco IOS XR Software",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Cisco"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability in the IPv6 protocol handling of the management interfaces of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause an IPv6 flood on the management interface network of an affected device. The vulnerability exists because the software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. An attacker could exploit this vulnerability by connecting to the same network as the management interfaces and injecting IPv6 packets that have an IPv6 node-local multicast group address destination. A successful exploit could allow the attacker to cause an IPv6 flood on the corresponding network. Depending on the number of Cisco IOS XR Software nodes on that network segment, exploitation could cause excessive network traffic, resulting in network degradation or a denial of service (DoS) condition."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
          }
        ],
        "impact": {
          "cvss": {
            "baseScore": "7.4",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-1076"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20210203 Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xripv6-spJem78K"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-xripv6-spJem78K",
          "defect": [
            [
              "CSCvv45504"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2021-1268",
    "datePublished": "2021-02-04T16:35:25.387Z",
    "dateReserved": "2020-11-13T00:00:00.000Z",
    "dateUpdated": "2024-11-08T23:54:23.194Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2021-09295

CVE-2021-1268 (GCVE-0-2021-1268)

Tags

Sightings

Nomenclature

Related by attack behaviour