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Vulnerability Details : CVE-2019-1840

A vulnerability in the DHCPv6 input packet processor of Cisco Prime Network Registrar could allow an unauthenticated, remote attacker to restart the server and cause a denial of service (DoS) condition on the affected system. The vulnerability is due to incomplete user-supplied input validation when a custom extension attempts to change a DHCPv6 packet received by the application. An attacker could exploit this vulnerability by sending malformed DHCPv6 packets to the application. An exploit could allow the attacker to trigger a restart of the service which, if exploited repeatedly, might lead to a DoS condition. This vulnerability can only be exploited if the administrator of the server has previously installed custom extensions that attempt to modify the packet details before the packet has been processed. Note: Although the CVSS score matches a High SIR, this has been lowered to Medium because this condition will only affect an application that has customer-developed extensions that will attempt to modify packet parameters before the packet has been completely sanitized. If packet modification in a custom extension happens after the packet has been sanitized, the application will not be affected by this vulnerability. Software versions prior to 8.3(7) and 9.1(2) are affected.
Publish Date : 2019-04-17 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
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 Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 665

- Products Affected By CVE-2019-1840

# Product Type Vendor Product Version Update Edition Language
1 Application Cisco Prime Network Registrar 6.1.4.2 Version Details Vulnerabilities
2 Application Cisco Prime Network Registrar 6.1.6 Version Details Vulnerabilities
3 Application Cisco Prime Network Registrar 6.2.3 Version Details Vulnerabilities
4 Application Cisco Prime Network Registrar 6.2.4 Version Details Vulnerabilities
5 Application Cisco Prime Network Registrar 6.3 Version Details Vulnerabilities
6 Application Cisco Prime Network Registrar 6.3.1 Version Details Vulnerabilities
7 Application Cisco Prime Network Registrar 6.3.2 Version Details Vulnerabilities
8 Application Cisco Prime Network Registrar 6.3.3 Version Details Vulnerabilities
9 Application Cisco Prime Network Registrar 7.0 Version Details Vulnerabilities
10 Application Cisco Prime Network Registrar 7.0.1 Version Details Vulnerabilities
11 Application Cisco Prime Network Registrar 7.1 Version Details Vulnerabilities
12 Application Cisco Prime Network Registrar 7.1.1 Version Details Vulnerabilities
13 Application Cisco Prime Network Registrar 7.1.2.1 Version Details Vulnerabilities
14 Application Cisco Prime Network Registrar 7.1.3 Version Details Vulnerabilities
15 Application Cisco Prime Network Registrar 7.2 Version Details Vulnerabilities
16 Application Cisco Prime Network Registrar 7.2.0.1 Version Details Vulnerabilities
17 Application Cisco Prime Network Registrar 7.2.1 Version Details Vulnerabilities
18 Application Cisco Prime Network Registrar 7.2.2 Version Details Vulnerabilities
19 Application Cisco Prime Network Registrar 7.2.3 Version Details Vulnerabilities
20 Application Cisco Prime Network Registrar 8.0 Version Details Vulnerabilities
21 Application Cisco Prime Network Registrar 8.1 Version Details Vulnerabilities
22 Application Cisco Prime Network Registrar 8.1.1 Version Details Vulnerabilities
23 Application Cisco Prime Network Registrar 8.1.2 Version Details Vulnerabilities
24 Application Cisco Prime Network Registrar 8.1.3 Version Details Vulnerabilities
25 Application Cisco Prime Network Registrar 8.2 Version Details Vulnerabilities
26 Application Cisco Prime Network Registrar 8.2.0 Version Details Vulnerabilities
27 Application Cisco Prime Network Registrar 8.2.0.1 Version Details Vulnerabilities
28 Application Cisco Prime Network Registrar 8.2.0.2 Version Details Vulnerabilities
29 Application Cisco Prime Network Registrar 8.2.1 Version Details Vulnerabilities
30 Application Cisco Prime Network Registrar 8.2.1.1 Version Details Vulnerabilities
31 Application Cisco Prime Network Registrar 8.2.2 Version Details Vulnerabilities
32 Application Cisco Prime Network Registrar 8.2.2.1 Version Details Vulnerabilities
33 Application Cisco Prime Network Registrar 8.3.0 Version Details Vulnerabilities
34 Application Cisco Prime Network Registrar 8.3.1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Cisco Prime Network Registrar 34

- References For CVE-2019-1840

http://www.securityfocus.com/bid/108033
BID 108033 Cisco Prime Network Registrar CVE-2019-1840 Denial of Service Vulnerability Release Date:2019-04-17
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-pnr-dos
CISCO 20190417 Cisco Prime Network Registrar Denial of Service Vulnerability

- Metasploit Modules Related To CVE-2019-1840

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


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