Summary

• A vulnerability in the CLI of the Cisco Integrated Management Controller (IMC) could allow an authenticated, local attacker to perform command injection attacks on the underlying operating system and elevate privileges to root. To exploit this vulnerability, the attacker must have read-only or higher privileges on an affected device. 

  This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted CLI command. A successful exploit could allow the attacker to elevate privileges to root. 

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

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cimc-cmd-inj-mUx4c5AJ

Affected Products

• Vulnerable Products

  This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco IMC in the default configuration:

  • 5000 Series Enterprise Network Compute Systems (ENCS)
  • Catalyst 8300 Series Edge uCPE
  • UCS C-Series Rack Servers in standalone mode
  • UCS E-Series Servers

  Cisco appliances that are based on a preconfigured version of a Cisco UCS C-Series Server are also affected if they expose access to the Cisco IMC CLI. At the time of publication, this included the following Cisco products:

  • 5520 and 8540 Wireless Controllers
  • Application Policy Infrastructure Controller (APIC) Servers
  • Business Edition 6000 and 7000 Appliances
  • Catalyst Center Appliances, formerly DNA Center (DNAC)
  • Cisco Telemetry Broker Appliance
  • Cloud Services Platform (CSP) 5000 Series
  • Common Services Platform Collector (CSPC) Appliances
  • Connected Mobile Experiences (CMX) Appliances
  • Connected Safety and Security UCS Platform Series Servers
  • Cyber Vision Center Appliances
  • Expressway Series Appliances
  • HyperFlex Edge Nodes
  • HyperFlex Nodes in HyperFlex Datacenter without Fabric Interconnect (DC-NO-FI) deployment mode
  • IEC6400 Edge Compute Appliances
  • IOS XRv 9000 Appliances
  • Meeting Server 1000 Appliances
  • Nexus Dashboard Appliances
  • Prime Infrastructure Appliances
  • Prime Network Registrar Jumpstart Appliances
  • Secure Email Gateways¹
  • Secure Email and Web Manager¹
  • Secure Endpoint Private Cloud Appliances
  • Secure Firewall Management Center Appliances, formerly Firepower Management Center
  • Secure Malware Analytics Appliances
  • Secure Network Analytics Appliances
  • Secure Network Server Appliances
  • Secure Web Appliances¹
  • Secure Workload Servers

  1. Cisco IMC is not directly accessible on these appliances, which significantly reduces the attack vector on these platforms.

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

  Attention: Simplifying the Cisco portfolio includes the renaming of security products under one brand: Cisco Secure. For more information, see Meet Cisco Secure.

  Products Confirmed Not Vulnerable

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

  Cisco has confirmed that this vulnerability does not affect the following Cisco products:

  • UCS B-Series Blade Servers
  • UCS C-Series Rack Servers managed by Cisco UCS Manager
  • UCS S-Series Storage Servers
  • UCS X-Series Modular Systems

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• Cisco has released free software updates that address the vulnerability 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 right column indicates whether a release is affected by the vulnerability that is described in this advisory and the first release that includes the fix for this vulnerability. Customers are advised to upgrade to an appropriate fixed software release as indicated in this section.

  Cisco 5000 Series ENCS and Catalyst 8300 Series Edge uCPE

  Note: Upgrading Cisco IMC on Cisco 5000 Series ENCS and Cisco Catalyst 8300 Series Edge uCPE requires upgrading Cisco Enterprise NFV Infrastructure Software (NFVIS) on the platforms. Cisco IMC is upgraded as part of the firmware auto-upgrade process.

  Cisco NFVIS Release	First Fixed Release
  3.12 and earlier	Migrate to a fixed release.
  4.13 and earlier	4.14.1

  Cisco UCS C-Series M4 Rack Server

  Cisco IMC Release	First Fixed Release
  4.0 and earlier	Migrate to a fixed release.
  4.1	4.1(2m)

  Cisco UCS C-Series M5 Rack Server

  Cisco IMC Release	First Fixed Release
  4.0 and earlier	Migrate to a fixed release.
  4.1	4.1(3m)
  4.2	4.2(3j)
  4.3	4.3(2.240002)

  Cisco UCS C-Series M6 Rack Server

  Cisco IMC Release	First Fixed Release
  4.2	4.2(3j)
  4.3	4.3(2.240002)

  Cisco UCS C-Series M7 Rack Server

  Cisco IMC Release	First Fixed Release
  4.3	4.3(2.240002)

  Cisco UCS E-Series M2 and M3

  Cisco IMC Release	First Fixed Release
  3.2.4 and earlier	Not vulnerable.
  3.2.6 and later	3.2.15

  Cisco UCS E-Series M6

  Cisco IMC Release	First Fixed Release
  4.12 and earlier	4.12.2

  Note: For Cisco appliances that are based on a preconfigured version of a Cisco UCS C-Series Server, administrators can perform a direct upgrade of the Cisco IMC software to one of the fixed releases mentioned in the preceding tables. For instructions, see the Cisco Host Upgrade Utility User Guide. The exceptions are the appliances that are listed in the following table. For these appliances, follow the instructions in the Remediation column:

  Cisco Hardware Platform	First Fixed Cisco IMC Release	Remediation
  Cisco Telemetry Broker Appliance	4.3(2.240009)	Apply the update m6-tb2300-ctb-firmware-4.3-2.240009.iso.
  IEC6400 Edge Compute Appliances	4.2(3j)	Apply the HUU upgrade using IEC6400-HUU-4.2.3j.img
  Secure Email Gateways	4.2(3j)	Install the Cisco IMC firmware update package.
  Secure Email and Web Manager	4.2(3j)	Install the Cisco IMC firmware update package.
  Secure Endpoint Private Cloud Appliances	4.3(2.240009)	Follow the steps documented in the TechNote.
  Secure Firewall Management Center Appliances	4.3(2.240009)	Apply Hotfix EZ.
  Secure Malware Analytics Appliances	4.3(2.240009)	Upgrade to release 2.19.4 (July 2024).
  Secure Network Analytics Appliances	4.1(2m) (M4) 4.3(2.240009) (M5, M6)	Apply the update ucs-c220m4-huu-4.1.2m-sna.iso or ucs-c240m4-huu-4.1.2m-sna.iso (M4). Install update patch patch-common-SNA-FIRMWARE-20240305-v2-01.swu (M5, M6).
  Secure Network Server Appliances	4.1(2m) (M4) 4.3(2.240009) (M5, M6)	Install and activate the 4.1(2m) firmware release for Cisco SNS 3500 Series. Apply the BIOS and HUU upgrade, as documented in Firmware Upgrade Guide for Cisco SNS 3700 Series or Cisco SNS 3600 Series.
  Secure Web Appliances	4.2(3j)	Install the Cisco IMC firmware update package.

  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 aware that proof-of-concept exploit code is available for the vulnerability that is described in this advisory.

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

Source

• Cisco would like to thank security researcher James Muller for reporting this vulnerability.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cimc-cmd-inj-mUx4c5AJ

Revision History

• Version	Description	Section	Status	Date
  1.2	Updated the fixed release and remediation information.	Fixed Releases	Final	2024-JUN-28
  1.1	Updated patch name for Cisco Telemetry Broker Appliance. Added links to patch download instructions.	Affected Products and Fixed Releases	Final	2024-APR-19
  1.0	Initial public release.	—	Final	2024-APR-17

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