CVE-2021-1390 Cisco IOS XE Software Local Privilege Escalation Vulnerability

Medium 5.1 Published 24 Mar 2021 Updated 8 Nov 2024

An authenticated local attacker with high privileges can exploit a diagnostic command logic error to execute arbitrary code on the underlying OS.

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-2021-1390?

CVE-2021-1390 is a medium-severity vulnerability in Cisco Ios Xe, published on 24 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in one of the diagnostic test CLI commands of Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker would need to have valid user credentials at privilege level 15. This vulnerability exists because the affected software permits modification of the run-time memory of an affected device under specific circumstances. An attacker could exploit this vulnerability by authenticating to the affected device and issuing a specific diagnostic test command at the CLI. A successful exploit could trigger a logic error in the code that was designed to restrict run-time memory modifications. The attacker could take advantage of this logic error to overwrite system memory locations and execute arbitrary code on the underlying Linux operating system (OS) of the affected device.

Weakness: CWE-123

Which versions are affected by CVE-2021-1390?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2021-1390?

No fix has been published for CVE-2021-1390 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-1390 being exploited?

There is no known exploitation of CVE-2021-1390 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-587f-4vmq-c6m5.