cnvd - cnvd-2020-07196

cnvd-2020-07196

Vulnerability from cnvd

Title: Cisco IOS XR BGP EVPN拒绝服务漏洞（CNVD-2020-07196）

Description:

Cisco IOS XR是一个完全模块化完全分布式的网络互联操作系统。

Cisco IOS XR 6.6.1及更高版本的边界网关协议(BGP)以太网VPN (EVPN)功能的实现存在拒绝服务漏洞。该漏洞源于对包含特制EVPN属性的BGP更新消息的处理不当。远程未认证攻击者可通过发送包含畸形属性的BGP EVPN更新消息利用该漏洞导致BGP进程意外重新启动，从而可导致拒绝服务。

Severity: 中

Patch Name: Cisco IOS XR BGP EVPN拒绝服务漏洞（CNVD-2020-07196）的补丁

Patch Description:

Cisco IOS XR是一个完全模块化完全分布式的网络互联操作系统。

Cisco IOS XR 6.6.1及更高版本的边界网关协议(BGP)以太网VPN (EVPN)功能的实现存在拒绝服务漏洞。该漏洞源于对包含特制EVPN属性的BGP更新消息的处理不当。远程未认证攻击者可通过发送包含畸形属性的BGP EVPN更新消息利用该漏洞导致BGP进程意外重新启动，从而可导致拒绝服务。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-20200122-ios-xr-evpn

Reference: https://nvd.nist.gov/vuln/detail/CVE-2019-16021

Impacted products

Name
Cisco IOS XR >=6.6.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-16021",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-16021"
    }
  },
  "description": "Cisco IOS XR\u662f\u4e00\u4e2a\u5b8c\u5168\u6a21\u5757\u5316\u5b8c\u5168\u5206\u5e03\u5f0f\u7684\u7f51\u7edc\u4e92\u8054\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nCisco IOS XR 6.6.1\u53ca\u66f4\u9ad8\u7248\u672c\u7684\u8fb9\u754c\u7f51\u5173\u534f\u8bae(BGP)\u4ee5\u592a\u7f51VPN (EVPN)\u529f\u80fd\u7684\u5b9e\u73b0\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u5305\u542b\u7279\u5236EVPN\u5c5e\u6027\u7684BGP\u66f4\u65b0\u6d88\u606f\u7684\u5904\u7406\u4e0d\u5f53\u3002\u8fdc\u7a0b\u672a\u8ba4\u8bc1\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u53d1\u9001\u5305\u542b\u7578\u5f62\u5c5e\u6027\u7684BGP EVPN\u66f4\u65b0\u6d88\u606f\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4BGP\u8fdb\u7a0b\u610f\u5916\u91cd\u65b0\u542f\u52a8\uff0c\u4ece\u800c\u53ef\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "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-20200122-ios-xr-evpn",
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  "number": "CNVD-2020-07196",
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  "products": {
    "product": "Cisco IOS XR \u003e=6.6.1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2019-16021",
  "serverity": "\u4e2d",
  "submitTime": "2020-01-23",
  "title": "Cisco IOS XR BGP EVPN\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-07196\uff09"
}

CVE-2019-16021 (GCVE-0-2019-16021)

Vulnerability from cvelistv5

Published

2020-09-23 00:26

Modified

2024-11-13 18:04

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-399

Summary

Multiple vulnerabilities in the implementation of Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerabilities are due to incorrect processing of BGP update messages that contain crafted EVPN attributes. An attacker could exploit these vulnerabilities by sending BGP EVPN update messages with malformed attributes to be processed by an affected system. A successful exploit could allow the attacker to cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit these vulnerabilities, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.

References

▼	URL	Tags
	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-evpn	vendor-advisory, x_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco IOS XR Software	Version: 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 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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