Summary

• Multiple vulnerabilities in the web-based management interface of certain Cisco IP Phones could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition.

  For more information about these vulnerabilities, see the Details section of this advisory.

  Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ip-phone-cmd-inj-KMFynVcP

Affected Products

• Vulnerable Products

  CVE-2023-20078

  This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco Multiplatform Firmware:

  • IP Phone 6800 Series with Multiplatform Firmware
  • IP Phone 7800 Series with Multiplatform Firmware
  • IP Phone 8800 Series with Multiplatform Firmware

  CVE-2023-20079

  This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco Multiplatform Firmware or Cisco Unified Software:

  • IP Phone 6800 Series with Multiplatform Firmware
  • IP Phone 7800 Series with Multiplatform Firmware
  • IP Phone 8800 Series with Multiplatform Firmware

  For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory.

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities.

  Cisco has confirmed that these vulnerabilities do not affect the following Cisco products:

  • ATA 191 Analog Telephone Adapter
  • ATA 192 Multiplatform Analog Telephone Adapter
  • IP Conference Phone 7832
  • IP Conference Phone 8832
  • IP DECT 110 Repeater with Multiplatform Firmware
  • IP DECT 210 Multi-Cell Base Station
  • IP DECT 6823 with Multiplatform Firmware
  • IP Phone 7800 Series
  • IP Phone 8845 and 8865
  • Unified IP Phone 3905
  • Video Phone 8875
  • Webex Room Phone
  • Webex Share
  • Webex Wireless Phones 840 and 860
  • Wireless IP Phone 8821

Details

• 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, 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 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
  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

Workarounds

• There are no workarounds that address these vulnerabilities.

Fixed Software

• 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

  Customers are advised to upgrade to an appropriate fixed software release as indicated in the following table:

  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.

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

Exploitation and Public Announcements

• The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

• These vulnerabilities were found during internal security testing by Zack Sanchez of the Cisco Advanced Security Initiatives Group (ASIG).

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ip-phone-cmd-inj-KMFynVcP

Revision History

• Version	Description	Section	Status	Date
  1.4	Removed Cisco Unified IP Conference Phone 8831 and Cisco Unified IP Conference Phone 8831 with Multiplatform Firmware as affected products and removed associated bug IDs.	Header, Vulnerable Products, Details, Fixed Releases	Final	2023-MAR-20
  1.3	Removed Cisco Unified IP Phone 7900 Series as an affected product.	Title, Vulnerable Products, Details, Fixed Releases	Final	2023-MAR-10
  1.2	Updated URLs for bug IDs CSCwd40494 and CSCwd40489.	Details	Final	2023-MAR-07
  1.1	Added end-of-life link for Cisco Unified IP Phone 7900 Series and updated the fixed release table intro.	Fixed Releases	Final	2023-MAR-03
  1.0	Initial public release.	-	Final	2023-MAR-01

  Show Less