CVE-2019-1962 Cisco NX-OS Software Cisco Fabric Services over IP Denial of Service Vulnerability
An unauthenticated remote attacker can cause a denial of service by sending malicious TCP packets to devices with the disabled-by-default CFSoIP feature 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-2019-1962?
CVE-2019-1962 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 Cisco Fabric Services component of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause process crashes, which can result in a denial of service (DoS) condition on an affected system. The vulnerability is due to insufficient validation of TCP packets when processed by the Cisco Fabric Services over IP (CFSoIP) feature. An attacker could exploit this vulnerability by sending a malicious Cisco Fabric Services TCP packet to an affected device. A successful exploit could allow the attacker to cause process crashes, resulting in a device reload and a DoS condition. Note: There are three distribution methods that can be configured for Cisco Fabric Services. This vulnerability affects only distribution method CFSoIP, which is disabled by default. See the Details section for more information.
Weakness: CWE-20
Which versions are affected by CVE-2019-1962?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2019-1962?
No fix has been published for CVE-2019-1962 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-2019-1962 being exploited?
There is no known exploitation of CVE-2019-1962 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-3x69-qg6m-7562.