CVE-2020-3272 Cisco Prime Network Registrar DHCP Denial of Service Vulnerability

What is CVE-2020-3272?

CVE-2020-3272 is a high-severity denial of service vulnerability in Cisco Prime Network Registrar, published on 22 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the DHCP server of Cisco Prime Network Registrar could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation of incoming DHCP traffic. An attacker could exploit this vulnerability by sending a crafted DHCP request to an affected device. A successful exploit could allow the attacker to cause a restart of the DHCP server process, causing a DoS condition.

Weakness: CWE-20

Which versions are affected by CVE-2020-3272?

It affects 1 product.

Products include Cisco Prime Network Registrar.

How do I fix CVE-2020-3272?

No fix has been published for CVE-2020-3272 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-3272 being exploited?

There is no known exploitation of CVE-2020-3272 in the wild and no public exploit code.

Other vulnerabilities in Cisco Prime Network Registrar

• CVE-2019-1840 Cisco Prime Network Registrar Denial of Service Vulnerability High 8.6
• CVE-2016-1427 Information disclosure in n/a High 7.5
• CVE-2015-6296 Hardcoded credentials in n/a High 7.2
• CVE-2020-3148 Cisco Prime Network Registrar Cross-Site Request Forgery Vulnerability High 7.1
• CVE-2017-6613 Denial of service in Cisco Prime Network Registrar Medium 5.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rprx-wwgg-c958.