Vulnerability-Lookup

CNVD-2021-68723

Vulnerability from cnvd - Published: 2021-09-07

Title

Cisco NX-OS Software拒绝服务漏洞（CNVD-2021-68723）

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的MPLS OAM特性存在拒绝服务漏洞，攻击者可通过发送恶意MPLS回显请求或回显回复数据包利用该漏洞导致MPLS OAM进程崩溃并多次重启。

Severity

中

Patch Name

Cisco NX-OS Software拒绝服务漏洞（CNVD-2021-68723）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的MPLS OAM特性存在拒绝服务漏洞，攻击者可通过发送恶意MPLS回显请求或回显回复数据包利用该漏洞导致MPLS OAM进程崩溃并多次重启。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-mpls-oam-dos-sGO9x5GM

Reference

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-mpls-oam-dos-sGO9x5GM

Impacted products

Name
Cisco NX-OS Software

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-1588",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-1588"
    }
  },
  "description": "Cisco NX-OS Software\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4ea4\u6362\u673a\u4f7f\u7528\u7684\u6570\u636e\u4e2d\u5fc3\u7ea7\u64cd\u4f5c\u7cfb\u7edf\u8f6f\u4ef6\u3002\n\nCisco NX-OS Software\u7684MPLS OAM\u7279\u6027\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u6076\u610fMPLS\u56de\u663e\u8bf7\u6c42\u6216\u56de\u663e\u56de\u590d\u6570\u636e\u5305\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4MPLS OAM\u8fdb\u7a0b\u5d29\u6e83\u5e76\u591a\u6b21\u91cd\u542f\u3002",
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  "number": "CNVD-2021-68723",
  "openTime": "2021-09-07",
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  "patchName": "Cisco NX-OS Software\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-68723\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco NX-OS Software"
  },
  "referenceLink": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-mpls-oam-dos-sGO9x5GM",
  "serverity": "\u4e2d",
  "submitTime": "2021-08-26",
  "title": "Cisco NX-OS Software\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2021-68723\uff09"
}

CVE-2021-1588 (GCVE-0-2021-1588)

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

Title

Cisco NX-OS Software MPLS OAM Denial of Service Vulnerability

Summary

A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation when an affected device is processing an MPLS echo-request or echo-reply packet. An attacker could exploit this vulnerability by sending malicious MPLS echo-request or echo-reply packets to an interface that is enabled for MPLS forwarding on the affected device. A successful exploit could allow the attacker to cause the MPLS OAM process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.

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-126

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

To clipboard

{
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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.