# CVE-2020-3161

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.

- Page: https://www.vulneraibility.com/cve/CVE-2020-3161
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03
- EPSS: 83.86% (percentile 99.7)
- Public exploit code: 1 on Exploit-DB · 1 GitHub proof of concept (first 2020-04-17)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2024-11-08)
- Weakness: CWE-20
- Published: 2020-04-15

## Affected

- cisco:ip_phone_8865_firmware
- cisco:ip_phone_8851_firmware
- cisco:ip_phone_7841_firmware
- cisco:ip_phone_7821_firmware
- cisco:ip_phone_8811_firmware
- cisco:ip_phone_8861_firmware
- cisco:ip_phone_8845_firmware
- cisco:ip_phone_7861_firmware
- cisco:ip_phone_8841_firmware
- cisco:ip_phone_7811_firmware
- cisco:ip_phone_8821_firmware
- cisco:ip_phone_8821-ex_firmware
- cisco:8831_firmware

## References

- [advisory] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs
- [other] http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3161

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.