Vulnerability-Lookup

CNVD-2021-68721

Vulnerability from cnvd - Published: 2021-09-07

Title

Cisco NX-OS Software拒绝服务漏洞（CNVD-2021-68721）

Description

Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software VXLAN OAM特性存在拒绝服务漏洞，攻击者可通过发送特制数据包利用该漏洞导致设备CPU使用率高并消耗过多的系统资源，导致受影响的设备重新加载。

Severity

中

Patch Name

Cisco NX-OS Software拒绝服务漏洞（CNVD-2021-68721）的补丁

Patch Description

Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software VXLAN OAM特性存在拒绝服务漏洞，攻击者可通过发送特制数据包利用该漏洞导致设备CPU使用率高并消耗过多的系统资源，导致受影响的设备重新加载。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

厂商已发布了漏洞修复程序，请及时关注更新： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ngoam-dos-LTDb9Hv

Reference

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ngoam-dos-LTDb9Hv

Impacted products

Name
Cisco NX-OS Software

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-1587",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-1587"
    }
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  "number": "CNVD-2021-68721",
  "openTime": "2021-09-07",
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  "patchName": "Cisco NX-OS Software\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-68721\uff09\u7684\u8865\u4e01",
  "products": {
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  "serverity": "\u4e2d",
  "submitTime": "2021-08-26",
  "title": "Cisco NX-OS Software\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-68721\uff09"
}

CVE-2021-1587 (GCVE-0-2021-1587)

Vulnerability from cvelistv5 – Published: 2021-08-25 19:11 – Updated: 2024-11-07 22:02

Title

Cisco NX-OS Software VXLAN OAM (NGOAM) Denial of Service Vulnerability

Summary

A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific packets with a Transparent Interconnection of Lots of Links (TRILL) OAM EtherType. An attacker could exploit this vulnerability by sending crafted packets, including the TRILL OAM EtherType of 0x8902, to a device that is part of a VXLAN Ethernet VPN (EVPN) fabric. A successful exploit could allow the attacker to cause an affected device to experience high CPU usage and consume excessive system resources, which may result in overall control plane instability and cause the affected device to reload. Note: The NGOAM feature is disabled by default.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-07 21:54 UTC

CWE

CWE-115

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 NX-OS Software	Affected: n/a

Date Public

2021-08-25 00:00

Show details on NVD website

JSON

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{
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        "providerMetadata": {
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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.