CVE-2021-1423 Cisco Aironet Access Points Arbitrary File Overwrite Vulnerability
An authenticated local attacker can overwrite or create files in flash memory via insufficient input validation in a CLI command.
- 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-2021-1423?
CVE-2021-1423 is a medium-severity path traversal vulnerability in Cisco Wireless Lan Controller Software, 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 the implementation of a CLI command in Cisco Aironet Access Points (AP) could allow an authenticated, local attacker to overwrite files in the flash memory of the device. This vulnerability is due to insufficient input validation for a specific command. An attacker could exploit this vulnerability by issuing a command with crafted arguments. A successful exploit could allow the attacker to overwrite or create files with data that is already present in other files that are hosted on the affected device.
Weakness: CWE-668
Which versions are affected by CVE-2021-1423?
It affects 3 products.
Products include Cisco Aironet Access Point Software, Cisco Catalyst 9800 Firmware, Cisco Wireless Lan Controller Software.
How do I fix CVE-2021-1423?
No fix has been published for CVE-2021-1423 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-2021-1423 being exploited?
There is no known exploitation of CVE-2021-1423 in the wild and no public exploit code.
Other vulnerabilities in Cisco Wireless Lan Controller Software
- CVE-2017-3831 Auth bypass in Cisco Mobility Express 1800 Access Point Series
- CVE-2022-20622 Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability
- CVE-2018-0234 Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points
- CVE-2016-1419 Denial of service in n/a
- CVE-2016-6362 Privilege escalation in n/a
Sources
Also known as GHSA-2ggr-q5x3-fm96.