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CVE-2020-3161

CRITICALCVSS 9.8/10Actively ExploitedEPSS 83.73%

Last modified

CVE-2020-3161 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 83.73% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
83.73%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIp Phone 8865 Firmware10.3\(1\)es14
CiscoIp Phone 8865 Firmware11.0\(1\)
CiscoIp Phone 8865 Firmware11.0\(5\)sr1
CiscoIp Phone 8851 Firmware10.3\(1\)es14
CiscoIp Phone 8851 Firmware11.0\(1\)
CiscoIp Phone 8851 Firmware11.0\(5\)sr1
CiscoIp Phone 7841 Firmware11.0\(1\)
CiscoIp Phone 7821 Firmware11.0\(1\)
CiscoIp Phone 8811 Firmware10.3\(1\)es14
CiscoIp Phone 8811 Firmware11.0\(1\)
CiscoIp Phone 8811 Firmware11.0\(5\)sr1
CiscoIp Phone 8861 Firmware10.3\(1\)es14
CiscoIp Phone 8861 Firmware11.0\(1\)
CiscoIp Phone 8861 Firmware11.0\(5\)sr1
CiscoIp Phone 8845 Firmware10.3\(1\)es14
CiscoIp Phone 8845 Firmware11.0\(1\)
CiscoIp Phone 8845 Firmware11.0\(5\)sr1
CiscoIp Phone 7861 Firmware11.0\(1\)
CiscoIp Phone 8841 Firmware10.3\(1\)es14
CiscoIp Phone 8841 Firmware11.0\(1\)
CiscoIp Phone 8841 Firmware11.0\(5\)sr1
CiscoIp Phone 7811 Firmware11.0\(1\)
CiscoIp Phone 8821 Firmware10.3\(1\)es14
CiscoIp Phone 8821 Firmware11.0\(1\)
CiscoIp Phone 8821 Firmware11.0\(5\)sr1
CiscoIp Phone 8821-Ex Firmware10.3\(1\)es14
CiscoIp Phone 8821-Ex Firmware11.0\(1\)
CiscoIp Phone 8821-Ex Firmware11.0\(5\)sr1
Cisco8831 Firmware10.3\(1\)es14
Cisco8831 Firmware11.0\(1\)
Cisco8831 Firmware11.0\(5\)sr1

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is 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.
How severe is CVE-2020-3161?
CVE-2020-3161 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 83.73% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2020-3161?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3161?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST