CVE-2019-1756 Cisco IOS XE Software Command Injection Vulnerability

High 7.2 Published 28 Mar 2019 Updated 20 Nov 2024

Authenticated attackers can execute arbitrary root commands on Cisco IOS XE devices via malicious input in the web UI, leading to full system compromise.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-1756?

CVE-2019-1756 is a high-severity command injection vulnerability in Cisco Ios, published on 28 Mar 2019. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability in Cisco IOS XE Software could allow an authenticated, remote 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 a username with a malicious payload in the web UI and subsequently making a request to a specific endpoint in the web UI. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.

Weakness: CWE-20

Which versions are affected by CVE-2019-1756?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2019-1756?

No fix has been published for CVE-2019-1756 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-2019-1756 being exploited?

There is no known exploitation of CVE-2019-1756 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-c5vj-536j-jp5v.