Vulnerability-Lookup

CNVD-2020-31826

Vulnerability from cnvd - Published: 2020-06-08

Title

Cisco IOS和IOS XE拒绝服务漏洞（CNVD-2020-31826）

Description

Cisco IOS和IOS XE都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS Software和Cisco IOS XE Software中的Secure Shell（SSH）服务器代码存在安全漏洞，该漏洞源于SSH状态机未正确表示内部状态。攻击者可通过建立与受影响设备的SSH连接利用该漏洞导致拒绝服务。

Severity

中

Patch Name

Cisco IOS和IOS XE拒绝服务漏洞（CNVD-2020-31826）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-dos-Un22sd2A

Impacted products

Name
['Cisco IOS Software', 'Cisco IOS XE Software']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-3200"
    }
  },
  "description": "Cisco IOS\u548cIOS XE\u90fd\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nCisco IOS Software\u548cCisco IOS XE Software\u4e2d\u7684Secure Shell\uff08SSH\uff09\u670d\u52a1\u5668\u4ee3\u7801\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eSSH\u72b6\u6001\u673a\u672a\u6b63\u786e\u8868\u793a\u5185\u90e8\u72b6\u6001\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5efa\u7acb\u4e0e\u53d7\u5f71\u54cd\u8bbe\u5907\u7684SSH\u8fde\u63a5\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-dos-Un22sd2A",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-31826",
  "openTime": "2020-06-08",
  "patchDescription": "Cisco IOS\u548cIOS XE\u90fd\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nCisco IOS Software\u548cCisco IOS XE Software\u4e2d\u7684Secure Shell\uff08SSH\uff09\u670d\u52a1\u5668\u4ee3\u7801\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eSSH\u72b6\u6001\u673a\u672a\u6b63\u786e\u8868\u793a\u5185\u90e8\u72b6\u6001\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5efa\u7acb\u4e0e\u53d7\u5f71\u54cd\u8bbe\u5907\u7684SSH\u8fde\u63a5\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\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\u548cIOS XE\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-31826\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Cisco IOS Software",
      "Cisco IOS XE Software"
    ]
  },
  "serverity": "\u4e2d",
  "submitTime": "2020-06-04",
  "title": "Cisco IOS\u548cIOS XE\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-31826\uff09"
}

CVE-2020-3200 (GCVE-0-2020-3200)

Vulnerability from cvelistv5 – Published: 2020-06-03 17:45 – Updated: 2024-11-15 17:12

Title

Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability

Summary

A vulnerability in the Secure Shell (SSH) server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which leads to an unexpected behavior. An attacker could exploit this vulnerability by creating an SSH connection to an affected device and using a specific traffic pattern that causes an error condition within that connection. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Severity

7.7 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/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 2024-11-15 16:28 UTC

CWE

CWE-371

Assigner

cisco mitre root

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 12.2(58)SE	Affected: n/a

Date Public

2020-06-03 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T07:24:00.796Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "name": "20200603 Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-dos-Un22sd2A"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2020-3200",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-15T16:28:05.268039Z",
                "version": "2.0.3"
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        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-15T17:12:41.085Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
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          "versions": [
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              "version": "n/a"
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      ],
      "datePublic": "2020-06-03T00:00:00.000Z",
      "descriptions": [
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        }
      ],
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          "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."
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      "metrics": [
        {
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
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      "problemTypes": [
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      },
      "references": [
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      ],
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      },
      "title": "Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability",
      "x_legacyV4Record": {
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          "ASSIGNER": "psirt@cisco.com",
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          "STATE": "PUBLIC",
          "TITLE": "Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability"
        },
        "affects": {
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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.

Detection rules are retrieved from Rulezet.

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.