CVE-2019-1729 Cisco NX-OS Software Arbitrary File Overwrite Vulnerability
An authenticated local attacker can overwrite arbitrary system files via a CLI command, potentially causing denial of service or system compromise.
- 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-2019-1729?
CVE-2019-1729 is a medium-severity path traversal 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 CLI implementation of a specific command used for image maintenance for Cisco NX-OS Software could allow an authenticated, local attacker to overwrite any file on the file system including system files. These file overwrites by the attacker are accomplished at the root privilege level. The vulnerability occurs because there is no verification of user-input parameters and or digital-signature verification for image files when using a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device and issuing a command at the CLI. Because an exploit could allow the attacker to overwrite any file on the disk, including system files, a denial of service (DoS) condition could occur. The attacker must have valid administrator credentials for the affected device to exploit this vulnerability.
Which versions are affected by CVE-2019-1729?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2019-1729?
No fix has been published for CVE-2019-1729 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2019-1729 being exploited?
There is no known exploitation of CVE-2019-1729 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-r2c4-53pj-jrgp.