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CVE-2022-20817

HIGHCVSS 7.4/10EPSS 1.12%

Last modified

CVE-2022-20817 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. EPSS estimates a 1.12% chance of exploitation in the next 30 days.

Description

A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.

Metrics

CVSS 3.1
7.4/10

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

EPSS Probability
1.12%

61.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoUnified Ip Phone 6911 FirmwareAll versions
CiscoUnified Ip Phone 6921 FirmwareAll versions
CiscoUnified Ip Phone 6941 FirmwareAll versions
CiscoUnified Ip Phone 6945 FirmwareAll versions
CiscoUnified Ip Phone 6961 FirmwareAll versions
CiscoUnified Ip Phone 8941 FirmwareAll versions
CiscoUnified Ip Phone 8945 FirmwareAll versions
CiscoUnified Ip Phone 8961 FirmwareAll versions
CiscoUnified Ip Phone 9951 FirmwareAll versions
CiscoUnified Ip Phone 9971 FirmwareAll versions
CiscoAta 187 Analog Telephone Adapter FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-20817?
A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.
How severe is CVE-2022-20817?
CVE-2022-20817 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 1.12% probability of exploitation in the next 30 days.
How do I fix CVE-2022-20817?
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.

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Source: NVD / NIST