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Vulnerability Details : CVE-2019-1909

A vulnerability in the implementation of Border Gateway Protocol (BGP) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. The vulnerability is due to incorrect processing of certain BGP update messages. An attacker could exploit this vulnerability by sending BGP update messages that include a specific set of 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 from explicitly defined peers only. 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.
Publish Date : 2019-07-05 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service

- Products Affected By CVE-2019-1909

# Product Type Vendor Product Version Update Edition Language
1 OS Cisco Ios Xr 4.3.1 Version Details Vulnerabilities
2 OS Cisco Ios Xr 4.3.2 Version Details Vulnerabilities
3 OS Cisco Ios Xr 4.3.3 Version Details Vulnerabilities
4 OS Cisco Ios Xr 4.3.4 Version Details Vulnerabilities
5 OS Cisco Ios Xr 5.0 Base Version Details Vulnerabilities
6 OS Cisco Ios Xr 5.0.0 Version Details Vulnerabilities
7 OS Cisco Ios Xr 5.0.1 Version Details Vulnerabilities
8 OS Cisco Ios Xr 5.1.0 Version Details Vulnerabilities
9 OS Cisco Ios Xr 5.1.1 Version Details Vulnerabilities
10 OS Cisco Ios Xr 5.1.1.k9sec Version Details Vulnerabilities
11 OS Cisco Ios Xr 5.1.2 Version Details Vulnerabilities
12 OS Cisco Ios Xr 5.1.3 Version Details Vulnerabilities
13 OS Cisco Ios Xr 5.2.0 Version Details Vulnerabilities
14 OS Cisco Ios Xr 5.2.1 Version Details Vulnerabilities
15 OS Cisco Ios Xr 5.2.2 Version Details Vulnerabilities
16 OS Cisco Ios Xr 5.2.4 Version Details Vulnerabilities
17 OS Cisco Ios Xr 5.3.0 Version Details Vulnerabilities
18 OS Cisco Ios Xr 5.3.0 Base Version Details Vulnerabilities
19 OS Cisco Ios Xr 5.3.2 Version Details Vulnerabilities
20 OS Cisco Ios Xr 6.0 Base Version Details Vulnerabilities
21 OS Cisco Ios Xr 6.0.0 Version Details Vulnerabilities
22 OS Cisco Ios Xr 6.0.1 Version Details Vulnerabilities
23 OS Cisco Ios Xr 6.0.2 Version Details Vulnerabilities
24 OS Cisco Ios Xr Version Details Vulnerabilities
25 OS Cisco Ios Xr 6.1.0 Version Details Vulnerabilities
26 OS Cisco Ios Xr 6.1.1 Version Details Vulnerabilities
27 OS Cisco Ios Xr 6.2.1 Version Details Vulnerabilities
28 OS Cisco Ios Xr 6.4.1 Base Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Cisco Ios Xr 28

- References For CVE-2019-1909
CISCO 20190703 Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2019-1909

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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