CVE-2019-1804 Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Default SSH Key Vulnerability
An unauthenticated remote attacker can gain root access to Cisco Nexus 9000 switches via IPv6 using a default SSH key.
- 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-2019-1804?
CVE-2019-1804 is a critical vulnerability in Cisco NX-OS Software for Nexus 9000 Series Fabric Switches ACI Mode 11.0.1b, 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 SSH key management for the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, remote attacker to connect to the affected system with the privileges of the root user. The vulnerability is due to the presence of a default SSH key pair that is present in all devices. An attacker could exploit this vulnerability by opening an SSH connection via IPv6 to a targeted device using the extracted key materials. An exploit could allow the attacker to access the system with the privileges of the root user. This vulnerability is only exploitable over IPv6; IPv4 is not vulnerable.
Which versions are affected by CVE-2019-1804?
It affects 13 products.
Products include Cisco Nexus 93108tc-Ex Firmware, Cisco Nexus 93120tx Firmware, Cisco Nexus 93128tx Firmware, Cisco Nexus 93180yc-Ex Firmware, Cisco Nexus 9332pq Firmware, Cisco Nexus 9372px Firmware and 7 more.
How do I fix CVE-2019-1804?
No fix has been published for CVE-2019-1804 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-1804 being exploited?
There is no known exploitation of CVE-2019-1804 in the wild and no public exploit code.
Sources
Also known as GHSA-9hxx-97w4-fh95.