CVE-2020-3161: Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability
CVE-2020-3161 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03
A vulnerability in the web server of Cisco IP Phones due to improper input validation of HTTP requests allows unauthenticated remote attackers to execute code with root privileges or cause a denial-of-service (DoS) condition via crafted HTTP requests.
Yes. CVE-2020-3161 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-3161?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Cisco IP Phone 7811 Firmware 11.0(1); Cisco IP Phone 7821 Firmware 11.0(1); Cisco IP Phone 7841 Firmware 11.0(1); Cisco IP Phone 7861 Firmware 11.0(1); and 6 more.
Is there a fix for CVE-2020-3161?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-3161 attacked?
It is attacked over the network, in device firmware.
Am I affected by CVE-2020-3161?
Check whether you run Cisco Ip Phones. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Cisco IP Phone 7811 Firmware 11.0(1)
Cisco IP Phone 7821 Firmware 11.0(1)
Cisco IP Phone 7841 Firmware 11.0(1)
Cisco IP Phone 7861 Firmware 11.0(1)
Cisco IP Phone 8811 Firmware 10.3(1)es14, 11.0(1), 11.0(5)sr1
Cisco IP Phone 8821 Firmware 10.3(1)es14, 11.0(1), 11.0(5)sr1
Cisco IP Phone 8841 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 8851 Firmware 10.3(1)es14, 11.0(1), 11.0(5)sr1