CVE-2019-1730 Cisco NX-OS Software Bash Bypass Guest Shell Vulnerability
Authenticated local attackers can bypass Guest Shell restrictions to execute commands with network-admin privileges on Cisco NX-OS devices.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1730?
CVE-2019-1730 is a medium-severity vulnerability in Cisco Nx-Os, published on 15 May 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to bypass the limited command set of the restricted Guest Shell and execute commands at the privilege level of a network-admin user outside of the Guest Shell. The attacker must authenticate with valid administrator device credentials. The vulnerability is due to the incorrect implementation of a CLI command that allows a Bash command to be incorrectly invoked on the Guest Shell CLI. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Guest Shell prompt. A successful exploit could allow the attacker to issue commands that should be restricted by a Guest Shell account.
Weakness: CWE-264
Which versions are affected by CVE-2019-1730?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2019-1730?
No fix has been published for CVE-2019-1730 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-1730 being exploited?
There is no known exploitation of CVE-2019-1730 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-6wr5-v37w-q3rj.