Vulnerability-Lookup

CNVD-2019-01889

Vulnerability from cnvd - Published: 2019-01-18

Title

Cisco IOS和Cisco IOS XE Software Secure Shell服务器访问控制错误漏洞

Description

Cisco IOS和IOS XE Software都是美国思科（Cisco）公司为其网络设备开发的操作系统。 Cisco IOS和Cisco IOS XE Software中的Secure Shell (SSH)服务器存在访问控制错误漏洞，该漏洞源于程序缺少检测。攻击者可借助VRF实例的源地址利用该漏洞打开受影响的设备的SSH连接。

Severity

中

Patch Name

Cisco IOS和Cisco IOS XE Software Secure Shell服务器访问控制错误漏洞的补丁

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://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk37852

Reference

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf

Impacted products

Name
['Cisco IOS XE Software 0', 'Cisco IOS 16.6.4', 'Cisco IOS 16.6.2']

Show details on source website

JSON

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{
  "bids": {
    "bid": {
      "bidNumber": "106560"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-0484",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0484"
    }
  },
  "description": "Cisco IOS\u548cIOS XE Software\u90fd\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nCisco IOS\u548cCisco IOS XE Software\u4e2d\u7684Secure Shell (SSH)\u670d\u52a1\u5668\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u7f3a\u5c11\u68c0\u6d4b\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9VRF\u5b9e\u4f8b\u7684\u6e90\u5730\u5740\u5229\u7528\u8be5\u6f0f\u6d1e\u6253\u5f00\u53d7\u5f71\u54cd\u7684\u8bbe\u5907\u7684SSH\u8fde\u63a5\u3002",
  "discovererName": "Cisco",
  "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://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk37852",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-01889",
  "openTime": "2019-01-18",
  "patchDescription": "Cisco IOS\u548cIOS XE Software\u90fd\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nCisco IOS\u548cCisco IOS XE Software\u4e2d\u7684Secure Shell (SSH)\u670d\u52a1\u5668\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u7f3a\u5c11\u68c0\u6d4b\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9VRF\u5b9e\u4f8b\u7684\u6e90\u5730\u5740\u5229\u7528\u8be5\u6f0f\u6d1e\u6253\u5f00\u53d7\u5f71\u54cd\u7684\u8bbe\u5907\u7684SSH\u8fde\u63a5\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\u548cCisco IOS XE Software Secure Shell\u670d\u52a1\u5668\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Cisco IOS XE Software 0",
      "Cisco IOS 16.6.4",
      "Cisco IOS 16.6.2"
    ]
  },
  "referenceLink": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf",
  "serverity": "\u4e2d",
  "submitTime": "2019-01-15",
  "title": "Cisco IOS\u548cCisco IOS XE Software Secure Shell\u670d\u52a1\u5668\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2018-0484 (GCVE-0-2018-0484)

Vulnerability from cvelistv5 – Published: 2019-01-10 18:00 – Updated: 2024-11-19 19:18

Title

Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability

Summary

A vulnerability in the access control logic of the Secure Shell (SSH) server of Cisco IOS and IOS XE Software may allow connections sourced from a virtual routing and forwarding (VRF) instance despite the absence of the vrf-also keyword in the access-class configuration. The vulnerability is due to a missing check in the SSH server. An attacker could use this vulnerability to open an SSH connection to an affected Cisco IOS or IOS XE device with a source address belonging to a VRF instance. Once connected, the attacker would still need to provide valid credentials to access the device.

Severity

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-19 17:25 UTC

CWE

CWE-284

Assigner

cisco CNA under the mitre root

CNA scorecard C 66/100 over 395 records in the last 180 days details

References

2 references

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO
http://www.securityfocus.com/bid/106560	vdb-entryx_refsource_BID

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco IOS	Affected: n/a

Date Public

2019-01-09 00:00

Show details on NVD website

JSON

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{
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        "providerMetadata": {
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          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "name": "20190109 Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability",
            "tags": [
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              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf"
          },
          {
            "name": "106560",
            "tags": [
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          }
        ],
        "title": "CVE Program Container"
      },
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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2018-0484",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco IOS",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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      ],
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        }
      ],
      "exploits": [
        {
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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": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
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        },
        {
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          "url": "http://www.securityfocus.com/bid/106560"
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      ],
      "source": {
        "advisory": "cisco-sa-20190109-ios-ssh-vrf",
        "defect": [
          [
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        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability",
      "x_legacyV4Record": {
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    "state": "PUBLISHED"
  },
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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.

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-2019-01889

CVE-2018-0484 (GCVE-0-2018-0484)

Tags

Sightings

Nomenclature

Related by attack behaviour