CVE-2019-1839 Cisco Remote PHY Device Software Command Injection Vulnerability
Authenticated local attackers can execute arbitrary commands as root on Cisco Remote PHY devices due to improper input sanitization.
- 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-2019-1839?
CVE-2019-1839 is a medium-severity command injection vulnerability in Cisco Remote PHY, published on 21 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in Cisco Remote PHY Device Software could allow an authenticated, local attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying various CLI commands with crafted arguments. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.
Which versions are affected by CVE-2019-1839?
It affects 4 products.
Products include Cisco Cbr-8 Firmware, Cisco Remote Phy 120 Firmware, Cisco Remote Phy 220 Firmware, Cisco Remote Phy Shelf 7200 Firmware.
How do I fix CVE-2019-1839?
No fix has been published for CVE-2019-1839 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2019-1839 being exploited?
There is no known exploitation of CVE-2019-1839 in the wild and no public exploit code.
Sources
Also known as GHSA-6hf6-gmp8-5xw9.