Vulnerability-Lookup

CNVD-2019-06605

Vulnerability from cnvd - Published: 2019-03-06

Title

Cisco NX-OS权限提升漏洞

Description

Cisco NX-OS是一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS的Bash shell实现存在权限提升漏洞。该漏洞源于Bash shell命令未能正确实现，导致可绕过基于角色的访问控制（RBAC）。本地认证攻击者可通过执行授权给其他用户角色的命令实现权限提升。

Severity

高

Patch Name

Cisco NX-OS权限提升漏洞的补丁

Patch Description

Cisco NX-OS是一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS的Bash shell实现存在权限提升漏洞。该漏洞源于Bash shell命令未能正确实现，导致可绕过基于角色的访问控制（RBAC）。本地认证攻击者可通过执行授权给其他用户角色的命令实现权限提升。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

厂商已发布漏洞修复程序，请及时关注更新：https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal

Reference

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal

Impacted products

Name
Cisco NX-OS 无

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-1593"
    }
  },
  "description": "Cisco NX-OS\u662f\u4e00\u5957\u4ea4\u6362\u673a\u4f7f\u7528\u7684\u6570\u636e\u4e2d\u5fc3\u7ea7\u64cd\u4f5c\u7cfb\u7edf\u8f6f\u4ef6\u3002\n\nCisco NX-OS\u7684Bash shell\u5b9e\u73b0\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8eBash shell\u547d\u4ee4\u672a\u80fd\u6b63\u786e\u5b9e\u73b0\uff0c\u5bfc\u81f4\u53ef\u7ed5\u8fc7\u57fa\u4e8e\u89d2\u8272\u7684\u8bbf\u95ee\u63a7\u5236\uff08RBAC\uff09\u3002\u672c\u5730\u8ba4\u8bc1\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u6267\u884c\u6388\u6743\u7ed9\u5176\u4ed6\u7528\u6237\u89d2\u8272\u7684\u547d\u4ee4\u5b9e\u73b0\u6743\u9650\u63d0\u5347\u3002",
  "discovererName": "Unknown",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1ahttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-06605",
  "openTime": "2019-03-06",
  "patchDescription": "Cisco NX-OS\u662f\u4e00\u5957\u4ea4\u6362\u673a\u4f7f\u7528\u7684\u6570\u636e\u4e2d\u5fc3\u7ea7\u64cd\u4f5c\u7cfb\u7edf\u8f6f\u4ef6\u3002\r\n\r\nCisco NX-OS\u7684Bash shell\u5b9e\u73b0\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8eBash shell\u547d\u4ee4\u672a\u80fd\u6b63\u786e\u5b9e\u73b0\uff0c\u5bfc\u81f4\u53ef\u7ed5\u8fc7\u57fa\u4e8e\u89d2\u8272\u7684\u8bbf\u95ee\u63a7\u5236\uff08RBAC\uff09\u3002\u672c\u5730\u8ba4\u8bc1\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u6267\u884c\u6388\u6743\u7ed9\u5176\u4ed6\u7528\u6237\u89d2\u8272\u7684\u547d\u4ee4\u5b9e\u73b0\u6743\u9650\u63d0\u5347\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 NX-OS\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco NX-OS \u65e0"
  },
  "referenceLink": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal",
  "serverity": "\u9ad8",
  "submitTime": "2019-03-07",
  "title": "Cisco NX-OS\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2019-1593 (GCVE-0-2019-1593)

Vulnerability from cvelistv5 – Published: 2019-03-06 22:00 – Updated: 2024-11-20 17:27

Title

Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability

Summary

A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level by executing commands authorized to other user roles. The attacker must authenticate with valid user credentials. The vulnerability is due to the incorrect implementation of a Bash shell command that allows role-based access control (RBAC) to be bypassed. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level by executing commands that should be restricted to other roles. For example, a dev-ops user could escalate their privilege level to admin with a successful exploit of this vulnerability.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-20 16:55 UTC

CWE

CWE-264

Assigner

cisco mitre root

References

2 references

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO
http://www.securityfocus.com/bid/107324	vdb-entryx_refsource_BID

Impacted products

6 products

Vendor	Product	Version
Cisco	Nexus 3000 Series Switches	Affected: unspecified , < 7.0(3)I7(4) (custom)
Cisco	Nexus 3500 Platform Switches	Affected: unspecified , < 7.0(3)I7(4) (custom)
Cisco	Nexus 3600 Platform Switches	Affected: unspecified , < 7.0(3)F3(5) (custom)
Cisco	Nexus 7000 and 7700 Series Switches	Affected: unspecified , < 8.2(3) (custom)
Cisco	Nexus 9000 Series Fabric Switches in ACI Mode	Affected: unspecified , < 13.2(4d) (custom) Affected: unspecified , < 14.0(1h) (custom)
Cisco	Nexus 9000 Series Switches in Standalone NX-OS Mode	Affected: unspecified , < 7.0(3)I4(9) (custom) Affected: unspecified , < 7.0(3)I7(4) (custom)

Date Public

2019-03-06 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T18:20:28.327Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20190306 Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal"
          },
          {
            "name": "107324",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/107324"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2019-1593",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-20T16:55:50.307290Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-20T17:27:13.520Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Nexus 3000 Series Switches",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "7.0(3)I7(4)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Nexus 3500 Platform Switches",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "7.0(3)I7(4)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Nexus 3600 Platform Switches",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "7.0(3)F3(5)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Nexus 7000 and 7700 Series Switches",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "8.2(3)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Nexus 9000 Series Fabric Switches in ACI Mode",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "13.2(4d)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThan": "14.0(1h)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Nexus 9000 Series Switches in Standalone NX-OS Mode",
          "vendor": "Cisco",
          "versions": [
            {
              "lessThan": "7.0(3)I4(9)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThan": "7.0(3)I7(4)",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2019-03-06T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level by executing commands authorized to other user roles. The attacker must authenticate with valid user credentials. The vulnerability is due to the incorrect implementation of a Bash shell command that allows role-based access control (RBAC) to be bypassed. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level by executing commands that should be restricted to other roles. For example, a dev-ops user could escalate their privilege level to admin with a successful exploit of this vulnerability."
        }
      ],
      "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": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-264",
              "description": "CWE-264",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-03-09T10:57:01.000Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20190306 Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal"
        },
        {
          "name": "107324",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/107324"
        }
      ],
      "source": {
        "advisory": "cisco-sa-20190306-nx-os-bash-escal",
        "defect": [
          [
            "CSCvj59431",
            "CSCvj59446",
            "CSCvk52940",
            "CSCvk52941"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2019-03-06T16:00:00-0800",
          "ID": "CVE-2019-1593",
          "STATE": "PUBLIC",
          "TITLE": "Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Nexus 3000 Series Switches",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "7.0(3)I7(4)"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Nexus 3500 Platform Switches",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "7.0(3)I7(4)"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Nexus 3600 Platform Switches",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "7.0(3)F3(5)"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Nexus 7000 and 7700 Series Switches",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "8.2(3)"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Nexus 9000 Series Fabric Switches in ACI Mode",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "13.2(4d)"
                          },
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "14.0(1h)"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Nexus 9000 Series Switches in Standalone NX-OS Mode",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "7.0(3)I4(9)"
                          },
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_value": "7.0(3)I7(4)"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Cisco"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to escalate their privilege level by executing commands authorized to other user roles. The attacker must authenticate with valid user credentials. The vulnerability is due to the incorrect implementation of a Bash shell command that allows role-based access control (RBAC) to be bypassed. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Bash prompt. A successful exploit could allow the attacker to escalate their privilege level by executing commands that should be restricted to other roles. For example, a dev-ops user could escalate their privilege level to admin with a successful exploit of this vulnerability."
            }
          ]
        },
        "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": "7.8",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-264"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20190306 Cisco NX-OS Software Bash Shell Role-Based Access Control Bypass Privilege Escalation Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nx-os-bash-escal"
            },
            {
              "name": "107324",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/107324"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-20190306-nx-os-bash-escal",
          "defect": [
            [
              "CSCvj59431",
              "CSCvj59446",
              "CSCvk52940",
              "CSCvk52941"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2019-1593",
    "datePublished": "2019-03-06T22:00:00.000Z",
    "dateReserved": "2018-12-06T00:00:00.000Z",
    "dateUpdated": "2024-11-20T17:27:13.520Z",
    "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.

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.