CVE-2023-20079: Cisco Security Advisory: Cisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI Vulnerabilities

The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit the other vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerability.

Details about the vulnerabilities are as follows:

CVE-2023-20078: Cisco IP Phone 6800, 7800, and 8800 Series Command Injection Vulnerability

A vulnerability in the web-based management interface of Cisco IP Phone 6800, 7800, and 8800 Series Multiplatform Phones could allow an unauthenticated, remote attacker to inject arbitrary commands that are executed with root privileges.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of an affected device.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Bug ID(s): CSCwc78400
CVE ID: CVE-2023-20078
Security Impact Rating (SIR): Critical
CVSS Base Score: 9.8
CVSS Vector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVE-2023-20079: Cisco IP Phone 6800, 7800, 7900, and 8800 Series Denial of Service Vulnerability

A vulnerability in the web-based management interface of Cisco IP Phone 6800, 7800, and 8800 Series Multiplatform Phones, as well as Cisco Unified IP Conference Phone 8831 and Unified IP Phone 7900 Series Phones, could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to cause a DoS condition.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Bug ID(s): CSCwd39132 CSCwd4074 CSCwd40494 CSCwd40489
CVE ID: CVE-2023-20079
Security Impact Rating (SIR): High
CVSS Base Score: 7.5
CVSS Vector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers with service contracts that entitle them to regular software updates should obtain security fixes through their usual update channels.

Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html

Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.

The Cisco Support and Downloads page on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool.

When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.

In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html

Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.

Fixed Releases

In the following tables, the left column lists Cisco software releases. The center columns indicates whether a release is affected by the vulnerabilities that are described in this advisory. The last column lists the first release that includes the fix for these vulnerabilities. Customers are advised to upgrade to an appropriate fixed software release as indicated in this section.

IP Phone 6800, 7800, and 8800 Series

Cisco Multiplatform Firmware Release

First Fixed Release for CVE-2023-20078

First Fixed Release for CVE-2023-20079

Earlier than 11.3.7SR1

11.3.7SR1

Migrate to a fixed release.

12.0.1

Not affected.

Not affected.

**Unified IP Phone 7900 Series, Unified IP Conference Phone 8831, and Unified IP Conference Phone 8831 with Multiplatform Firmware
**

Cisco has not released and will not release software updates to address the vulnerabilities that are described in CVE-2023-20079. Cisco Unified IP Phone 7900 Series and Cisco Unified IP Conference Phone 8831 have entered the end-of-life process. Customers are advised to refer to the end-of-life notices for these products:

End-of-Sale and End-of-Life Announcement for the Cisco Unified IP Phones 7945, 7965, 7975 and 7916

End-of-Sale and End-of-Life Announcement for the Cisco Select IP Conference Phone 8831 for on-premise and accessories

End-of-Sale and End-of-Life Announcement for the Cisco IP Conference Phone 8831 for Multiplatform Phones and Accessories

When considering a device migration, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.

In all cases, customers should ensure that the new phone will be sufficient for their network needs and that current hardware and software configurations will continue to be supported properly by the new product. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.