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.

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

• 9.8CVSS 3.0, Criticalfrom the CNA (cisco)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

• Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Timeline

1. 15 Apr 2020 Published
2. 3 Nov 2021 CVE-2020-3161 added to CISA KEV
3. 3 Nov 2021 Added to the CISA KEV catalogue

Weakness

• CWE-20

References

• 20200415 Cisco IP Phones Web Server Remote Code Execution and Denial of Service Vulnerabilityvendor-advisoryx_refsource_CISCO
• packetstormsecurity.comx_refsource_MISC