cnvd - cnvd-2020-50555

cnvd-2020-50555

Vulnerability from cnvd

Title: Cisco NX-OS拒绝服务漏洞（CNVD-2020-50555）

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。TCP（Transmission Control Protocol,传输控制协议）是一种面向连接的、可靠的、基于字节流的传输层通信协议，由IETF的RFC 793定义。

Cisco NX-OS Border Gateway Protocol (BGP) Multicast VPN (MVPN) 组件存在安全漏洞，该漏洞是由于对特定类型的BGP MVPN更新消息的解析错误造成的，攻击者可以通过将此BGP MVPN更新消息发送到目标设备来利用此漏洞。

Severity: 中

Patch Name: Cisco NX-OS拒绝服务漏洞（CNVD-2020-50555）的补丁

Patch Description:

Cisco NX-OS Border Gateway Protocol (BGP) Multicast VPN (MVPN) 组件存在安全漏洞，该漏洞是由于对特定类型的BGP MVPN更新消息的解析错误造成的，攻击者可以通过将此BGP MVPN更新消息发送到目标设备来利用此漏洞。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-nxosbgp-mvpn-dos-K8kbCrJp

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-3398

Impacted products

Name
Cisco NX-OS Border Gateway Protocol (BGP) Multicast VPN (MVPN)

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-3398",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-3398"
    }
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  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxosbgp-mvpn-dos-K8kbCrJp",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-50555",
  "openTime": "2020-09-07",
  "patchDescription": "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\u3002TCP\uff08Transmission Control Protocol,\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff09\u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u3001\u57fa\u4e8e\u5b57\u8282\u6d41\u7684\u4f20\u8f93\u5c42\u901a\u4fe1\u534f\u8bae\uff0c\u7531IETF\u7684RFC 793\u5b9a\u4e49\u3002\r\n\r\nCisco NX-OS Border Gateway Protocol (BGP) Multicast VPN (MVPN) \u7ec4\u4ef6\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u662f\u7531\u4e8e\u5bf9\u7279\u5b9a\u7c7b\u578b\u7684BGP MVPN\u66f4\u65b0\u6d88\u606f\u7684\u89e3\u6790\u9519\u8bef\u9020\u6210\u7684\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u5c06\u6b64BGP MVPN\u66f4\u65b0\u6d88\u606f\u53d1\u9001\u5230\u76ee\u6807\u8bbe\u5907\u6765\u5229\u7528\u6b64\u6f0f\u6d1e\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\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-50555\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco NX-OS Border Gateway Protocol (BGP) Multicast VPN (MVPN)"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-3398",
  "serverity": "\u4e2d",
  "submitTime": "2020-08-27",
  "title": "Cisco NX-OS\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-50555\uff09"
}

CVE-2020-3398 (GCVE-0-2020-3398)

Vulnerability from cvelistv5

Published

2020-08-27 15:40

Modified

2024-11-13 18:10

Severity ?

8.6 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE

CWE-20

Summary

A vulnerability in the Border Gateway Protocol (BGP) Multicast VPN (MVPN) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a BGP session to repeatedly reset, causing a partial denial of service (DoS) condition due to the BGP session being down. The vulnerability is due to incorrect parsing of a specific type of BGP MVPN update message. An attacker could exploit this vulnerability by sending this BGP MVPN update message to a targeted device. A successful exploit could allow the attacker to cause the BGP peer connections to reset, which could lead to BGP route instability and impact traffic. The incoming BGP MVPN update message is valid but is parsed incorrectly by the NX-OS device, which could send a corrupted BGP update to the configured BGP peer. Note: The Cisco implementation of BGP accepts incoming BGP traffic from only explicitly configured peers. To exploit this vulnerability, an attacker must send a specific BGP MVPN update message over an established TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the trusted network of the affected system.

References

▼	URL	Tags
	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxosbgp-mvpn-dos-K8kbCrJp	vendor-advisory, x_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco NX-OS Software	Version: n/a

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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