Vulnerability-Lookup

CNVD-2019-21309

Vulnerability from cnvd - Published: 2019-07-05

Title

Cisco Nexus 9000 Series Fabric Switches访问控制错误漏洞

Description

Cisco Nexus 9000 Series Fabric Switches是美国思科（Cisco）公司的一款9000系列光纤交换机。 Cisco Nexus 9000 Series Fabric Switches（处于ACI模式）中建立fabric infrastructure VLAN链接的过程存在访问控制错误漏洞。攻击者可通过在临近的子节点上向Cisco Nexus 9000 Series Switch发送恶意的LLDP数据包利用该漏洞绕过安全限制并将未授权的服务器连接到基础设施的VLAN。

Severity

中

Patch Name

Cisco Nexus 9000 Series Fabric Switches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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass

Reference

https://nvd.nist.gov/vuln/detail/CVE-2019-1890

Impacted products

Name
Cisco Nexus 9000 Series Fabric Switches

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2019-1890"
    }
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  "description": "Cisco Nexus 9000 Series Fabric Switches\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u6b3e9000\u7cfb\u5217\u5149\u7ea4\u4ea4\u6362\u673a\u3002\n\nCisco Nexus 9000 Series Fabric Switches\uff08\u5904\u4e8eACI\u6a21\u5f0f\uff09\u4e2d\u5efa\u7acbfabric infrastructure VLAN\u94fe\u63a5\u7684\u8fc7\u7a0b\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5728\u4e34\u8fd1\u7684\u5b50\u8282\u70b9\u4e0a\u5411Cisco Nexus 9000 Series Switch\u53d1\u9001\u6076\u610f\u7684LLDP\u6570\u636e\u5305\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u9650\u5236\u5e76\u5c06\u672a\u6388\u6743\u7684\u670d\u52a1\u5668\u8fde\u63a5\u5230\u57fa\u7840\u8bbe\u65bd\u7684VLAN\u3002",
  "discovererName": "unKnow",
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  "number": "CNVD-2019-21309",
  "openTime": "2019-07-05",
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  "serverity": "\u4e2d",
  "submitTime": "2019-07-05",
  "title": "Cisco Nexus 9000 Series Fabric Switches\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2019-1890 (GCVE-0-2019-1890)

Vulnerability from cvelistv5 – Published: 2019-07-04 20:00 – Updated: 2024-11-21 19:20

Title

Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized Access Vulnerability

Summary

A vulnerability in the fabric infrastructure VLAN connection establishment of the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. The vulnerability is due to insufficient security requirements during the Link Layer Discovery Protocol (LLDP) setup phase of the infrastructure VLAN. An attacker could exploit this vulnerability by sending a malicious LLDP packet on the adjacent subnet to the Cisco Nexus 9000 Series Switch in ACI mode. A successful exploit could allow the attacker to connect an unauthorized server to the infrastructure VLAN, which is highly privileged. With a connection to the infrastructure VLAN, the attacker can make unauthorized connections to Cisco Application Policy Infrastructure Controller (APIC) services or join other host endpoints.

Severity

7.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-21 18:57 UTC

CWE

CWE-284

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/109052	vdb-entryx_refsource_BID

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco NX-OS System Software in ACI Mode 11.0.1b	Affected: unspecified , < 14.1(2g) (custom)

Date Public

2019-07-03 00:00

Show details on NVD website

JSON

To clipboard

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          },
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        "metrics": [
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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.