CVE-2020-3161
Description
A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.
How to fix
Apply updates per vendor instructions.
CISA due date: May 3, 2022Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ip_phone_8865_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_8851_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_7841_firmware | 11.0\(1\) | — |
| cisco ip_phone_7821_firmware | 11.0\(1\) | — |
| cisco ip_phone_8811_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_8861_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_8845_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_7861_firmware | 11.0\(1\) | — |
| cisco ip_phone_8841_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_7811_firmware | 11.0\(1\) | — |
| cisco ip_phone_8821_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco ip_phone_8821-ex_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
| cisco 8831_firmware | 10.3\(1\)es14, 11.0\(1\), 11.0\(5\)sr1 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.