cnvd - cnvd-2020-04053

cnvd-2020-04053

Vulnerability from cnvd

Title: Cisco IOS XR拒绝服务漏洞（CNVD-2020-04053）

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。攻击者可利用该漏洞通过发送包含特定畸形属性的BGP EVPN更新消息导致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拒绝服务漏洞（CNVD-2020-04053）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。攻击者可利用该漏洞通过发送包含特定畸形属性的BGP EVPN更新消息导致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-routes

Reference: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes

Impacted products

Name
Cisco IOS XR >=6.6.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-16018",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-16018"
    }
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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-20200122-ios-xr-routes",
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  "number": "CNVD-2020-04053",
  "openTime": "2020-02-06",
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  "products": {
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  "serverity": "\u4e2d",
  "submitTime": "2020-01-23",
  "title": "Cisco IOS XR\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2020-04053\uff09"
}

CVE-2019-16018 (GCVE-0-2019-16018)

Vulnerability from cvelistv5

Published

2020-01-26 04:30

Modified

2024-11-15 17:46

Severity ?

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

CWE

CWE-399

Summary

A vulnerability 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 vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could 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 this vulnerability, 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-routes	vendor-advisory, x_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco IOS XR Software	Version: unspecified < 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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