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CVE-2019-15989— Cisco IOS XR Software Border Gateway Protocol Attribute Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR中Border Gateway Protocol(边界网关协议)的功能实现存在代码问题漏洞，该漏洞源于程序没有正确处理包含特定BGP属性的BGP更新消息。远程攻击者可借助恶意的BGP更新消息利用该漏洞造成拒绝服务。

AI Predicted 7.5 Difficulty: Hard EPSS 1.31% · P68
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I. Basic Information for CVE-2019-15989

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Border Gateway Protocol Attribute Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the implementation of the Border Gateway Protocol (BGP) 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 a specific BGP attribute. An attacker could exploit this vulnerability by sending BGP update messages that include a specific, malformed attribute 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 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR中Border Gateway Protocol(边界网关协议)的功能实现存在代码问题漏洞，该漏洞源于程序没有正确处理包含特定BGP属性的BGP更新消息。远程攻击者可借助恶意的BGP更新消息利用该漏洞造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XR Software unspecified ~ n/a -

II. Public POCs for CVE-2019-15989

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III. Intelligence Information for CVE-2019-15989

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Vendor Advisories for CVE-2019-15989 (1)

Same Patch Batch · Cisco · 2020-01-26 · 24 CVEs total

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CVE-2019-16018 Cisco IOS XR Software EVPN Operational Routes Denial of Service Vulnerability
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CVE-2019-16027 Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service Vulnera
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CVE-2019-16026 Cisco Mobility Management Entity Denial of Service Vulnerability
CVE-2019-16024 Cisco Crosswork Change Automation Cross-Site Scripting Vulnerability
CVE-2019-16008 Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware Cross-Site Scriptin

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-754

V. Comments for CVE-2019-15989

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