CVE-2020-3170 Cisco NX-OS Software NX-API Denial of Service Vulnerability
Unauthenticated remote attackers can cause a denial of service in the NX-API service by sending crafted HTTP requests, requiring the feature 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-2020-3170?
CVE-2020-3170 is a medium-severity denial of service vulnerability in Cisco Nx-Os, published on 26 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an NX-API system process to unexpectedly restart. The vulnerability is due to incorrect validation of the HTTP header of a request that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API on an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition in the NX-API service; however, the Cisco NX-OS device itself would still be available and passing network traffic. Note: The NX-API feature is disabled by default.
Weakness: CWE-20
Which versions are affected by CVE-2020-3170?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2020-3170?
No fix has been published for CVE-2020-3170 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-2020-3170 being exploited?
There is no known exploitation of CVE-2020-3170 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-c5q3-grp9-wgrh.