cnvd - cnvd-2019-01889

cnvd-2019-01889

Vulnerability from cnvd

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:

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。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:

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

To clipboard

{
  "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

Modified

2024-11-19 19:18

Severity ?

5.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-284

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.

References

▼	URL	Tags
	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf	vendor-advisory, x_refsource_CISCO
	http://www.securityfocus.com/bid/106560	vdb-entry, x_refsource_BID

Impacted products

	Vendor	Product	Version
	Cisco	Cisco IOS	Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T03:28:11.002Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20190109 Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf"
          },
          {
            "name": "106560",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/106560"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2018-0484",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-19T17:25:45.752737Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-19T19:18:45.475Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco IOS",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2019-01-09T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "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_0": {
            "attackComplexity": "LOW",
            "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",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-01-16T10:57:01",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20190109 Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf"
        },
        {
          "name": "106560",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/106560"
        }
      ],
      "source": {
        "advisory": "cisco-sa-20190109-ios-ssh-vrf",
        "defect": [
          [
            "CSCvk37852"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2019-01-09T16:00:00-0800",
          "ID": "CVE-2018-0484",
          "STATE": "PUBLIC",
          "TITLE": "Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Cisco IOS",
                      "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 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."
            }
          ]
        },
        "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": "5.3",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-284"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20190109 Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf"
            },
            {
              "name": "106560",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/106560"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-20190109-ios-ssh-vrf",
          "defect": [
            [
              "CSCvk37852"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2018-0484",
    "datePublished": "2019-01-10T18:00:00Z",
    "dateReserved": "2017-11-27T00:00:00",
    "dateUpdated": "2024-11-19T19:18:45.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted