CVE-2019-1964 Cisco NX-OS Software IPv6 Denial of Service Vulnerability
Remote attackers can cause a denial of service by sending malformed IPv6 packets to Cisco NX-OS devices, potentially triggering a device reboot.
- 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-2019-1964?
CVE-2019-1964 is a high-severity denial of service vulnerability in Cisco Nx-Os, published on 28 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the IPv6 traffic processing of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an unexpected restart of the netstack process on an affected device. The vulnerability is due to improper validation of IPv6 traffic sent through an affected device. An attacker could exploit this vulnerability by sending a malformed IPv6 packet through an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition while the netstack process restarts. A sustained attack could lead to a reboot of the device.
Weakness: CWE-20
Which versions are affected by CVE-2019-1964?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2019-1964?
No fix has been published for CVE-2019-1964 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-2019-1964 being exploited?
There is no known exploitation of CVE-2019-1964 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-23r8-fhxm-33gj.