CVE-2019-1206 Windows DHCP Server Denial of Service Vulnerability

High 7.5 Published 14 Aug 2019 Updated 4 Aug 2024

An attacker can cause a denial of service in Windows DHCP failover servers by sending specially crafted packets, requiring failover mode to be enabled.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-1206?

CVE-2019-1206 is a high-severity memory corruption vulnerability in Microsoft Windows Server 2012, published on 14 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A memory corruption vulnerability exists in the Windows Server DHCP service when an attacker sends specially crafted packets to a DHCP failover server. An attacker who successfully exploited the vulnerability could cause the DHCP service to become nonresponsive. To exploit the vulnerability, an attacker could send a specially crafted packet to a DHCP server. However, the DHCP server must be set to failover mode for the attack to succeed. The security update addresses the vulnerability by correcting how DHCP failover servers handle network packets.

Weakness: CWE-787

Which versions are affected by CVE-2019-1206?

It affects 3 products.

Products include Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019.

How do I fix CVE-2019-1206?

No fix has been published for CVE-2019-1206 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-1206 being exploited?

There is no known exploitation of CVE-2019-1206 in the wild and no public exploit code.

All Microsoft Windows Server 2012 vulnerabilities

Sources

Also known as GHSA-534v-m7q8-9qgf.