CVE-2020-3477 Cisco IOS and IOS XE Software Information Disclosure Vulnerability

Medium 5.5 Published 24 Sep 2020 Updated 13 Nov 2024

An authenticated local attacker can read restricted files from the flash filesystem in Cisco IOS and IOS XE devices.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3477?

CVE-2020-3477 is a medium-severity vulnerability in Cisco Ios, published on 24 Sep 2020. 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 parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to access files from the flash: filesystem. The vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit this vulnerability by using a specific command at the command line. A successful exploit could allow the attacker to obtain read-only access to files that are located on the flash: filesystem that otherwise might not have been accessible.

Weakness: CWE-863, CWE-20

Which versions are affected by CVE-2020-3477?

It affects 1 product.

Products include Cisco Ios.

How do I fix CVE-2020-3477?

No fix has been published for CVE-2020-3477 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3477 being exploited?

There is no known exploitation of CVE-2020-3477 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-vv6f-f322-w3fx.