cnvd - cnvd-2021-26111

CNVD-2021-26111

Vulnerability from cnvd - Published: 2021-04-09

Title

Cisco Link Layer Discovery Protocol拒绝服务漏洞

Description

Cisco Link Layer Discovery Protocol是美国思科（Cisco）公司的一个路由器。 Cisco Link Layer Discovery Protocol 存在安全漏洞，攻击者可利用该漏洞可以执行任意代码，或导致受影响的路由器泄漏系统内存或重新加载。

Severity

中

Patch Name

Cisco Link Layer Discovery Protocol拒绝服务漏洞的补丁

Patch Description

Cisco Link Layer Discovery Protocol是美国思科（Cisco）公司的一个路由器。 Cisco Link Layer Discovery Protocol 存在安全漏洞，攻击者可利用该漏洞可以执行任意代码，或导致受影响的路由器泄漏系统内存或重新加载。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

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-rv-multi-lldp-u7e4chCe

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-1251

Impacted products

Name
Cisco Link Layer Discovery Protocol

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2021-1251"
    }
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  "description": "Cisco Link Layer Discovery Protocol\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u4e2a\u8def\u7531\u5668\u3002\n\nCisco Link Layer Discovery Protocol \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u4ee5\u6267\u884c\u4efb\u610f\u4ee3\u7801\uff0c\u6216\u5bfc\u81f4\u53d7\u5f71\u54cd\u7684\u8def\u7531\u5668\u6cc4\u6f0f\u7cfb\u7edf\u5185\u5b58\u6216\u91cd\u65b0\u52a0\u8f7d\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-26111",
  "openTime": "2021-04-09",
  "patchDescription": "Cisco Link Layer Discovery Protocol\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u4e2a\u8def\u7531\u5668\u3002\r\n\r\nCisco Link Layer Discovery Protocol \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u4ee5\u6267\u884c\u4efb\u610f\u4ee3\u7801\uff0c\u6216\u5bfc\u81f4\u53d7\u5f71\u54cd\u7684\u8def\u7531\u5668\u6cc4\u6f0f\u7cfb\u7edf\u5185\u5b58\u6216\u91cd\u65b0\u52a0\u8f7d\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 Link Layer Discovery Protocol\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco Link Layer Discovery Protocol"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-1251",
  "serverity": "\u4e2d",
  "submitTime": "2021-04-09",
  "title": "Cisco Link Layer Discovery Protocol\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2021-1251 (GCVE-0-2021-1251)

Vulnerability from cvelistv5 – Published: 2021-04-08 04:05 – Updated: 2024-11-08 23:29

Summary

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Severity ?

7.4 (High)


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

CWE

CWE-119

Assigner

cisco

References

URL

Tags

https://tools.cisco.com/security/center/content/C…

vendor-advisoryx_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco Small Business RV Series Router Firmware	Affected: n/a

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

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.

Action not permitted

CNVD-2021-26111

CVE-2021-1251 (GCVE-0-2021-1251)

Tags

Sightings

Nomenclature