CVE-2019-1590 Auth bypass in Cisco NX-OS Software for Nexus 9000 Series Fabric Switches ACI Mode
An attacker with a trusted certificate can bypass TLS validation to gain full control of the ACI fabric components.
- 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-2019-1590?
CVE-2019-1590 is a high-severity authentication bypass vulnerability in Cisco Nx-Os, published on 3 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Transport Layer Security (TLS) certificate validation functionality of Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, remote attacker to perform insecure TLS client authentication on an affected device. The vulnerability is due to insufficient TLS client certificate validations for certificates sent between the various components of an ACI fabric. An attacker who has possession of a certificate that is trusted by the Cisco Manufacturing CA and the corresponding private key could exploit this vulnerability by presenting a valid certificate while attempting to connect to the targeted device. An exploit could allow the attacker to gain full control of all other components within the ACI fabric of an affected device.
Weakness: CWE-295
Which versions are affected by CVE-2019-1590?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2019-1590?
No fix has been published for CVE-2019-1590 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2019-1590 being exploited?
There is no known exploitation of CVE-2019-1590 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-9fr7-cq74-hp3w.