CVE-2021-34711 Cisco IP Phone Software Arbitrary File Read Vulnerability
An authenticated local attacker can read arbitrary files on Cisco IP Phones via insufficient input validation in the debug shell.
- 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-2021-34711?
CVE-2021-34711 is a medium-severity path traversal vulnerability in Cisco IP Phones with Multiplatform Firmware, published on 6 Oct 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 debug shell of Cisco IP Phone software could allow an authenticated, local attacker to read any file on the device file system. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by providing crafted input to a debug shell command. A successful exploit could allow the attacker to read any file on the device file system.
Which versions are affected by CVE-2021-34711?
It affects 16 products.
Products include Cisco Ip Conference Phone 7832 Firmware, Cisco Ip Conference Phone 8832 Firmware, Cisco Ip Phone 7811 Firmware, Cisco Ip Phone 7821 Firmware, Cisco Ip Phone 7832 Firmware, Cisco Ip Phone 7841 Firmware and 10 more.
How do I fix CVE-2021-34711?
No fix has been published for CVE-2021-34711 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-2021-34711 being exploited?
There is no known exploitation of CVE-2021-34711 in the wild and no public exploit code.
Other vulnerabilities in Cisco IP Phones with Multiplatform Firmware
- CVE-2020-3111 Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability
- CVE-2019-1635 Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service Vulnerability
- CVE-2021-1379 Memory corruption in Cisco IP Phones with Multiplatform Firmware
- CVE-2019-1684 Denial of service in Cisco IP Phone 8800 Series Software
- CVE-2019-1922 Cisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerability
Sources
Also known as GHSA-rh9c-8fw7-2j3p.