A vulnerability in the command-line interface of Cisco Integrated Management Controller (IMC) could allow an authenticated, local attacker with read-only credentials to inject arbitrary commands that could allow them to obtain root privileges. The vulnerability is due to insufficient validation of user-supplied input on the command-line interface. An attacker could exploit this vulnerability by authenticating with read-only privileges via the CLI of an affected device and submitting crafted input to the affected commands. A successful exploit could allow an attacker to execute arbitrary commands on the device with root privileges. 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-cimc-cli-inject
A vulnerability in the command-line interface of Cisco Integrated Management Controller (IMC) could allow an authenticated, local attacker with read-only credentials to inject arbitrary commands that could allow them to obtain root privileges.
The vulnerability is due to insufficient validation of user-supplied input on the command-line interface. An attacker could exploit this vulnerability by authenticating with read-only privileges via the CLI of an affected device and submitting crafted input to the affected commands. A successful exploit could allow an attacker to execute arbitrary commands on the device with root privileges.
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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-cimc-cli-inject
This vulnerability affects the following Cisco products:
For information about affected software releases, consult the Fixed Software section of this advisory.
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 FI-Attached servers managed by UCS Manager:There are no workarounds that address this vulnerability.
Cisco has released free software updates that address the vulnerability described in this advisory. 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.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts 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 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.
Customers are advised to upgrade to the appropriate UCS C-Series and S-Series software release as indicated in the following table:
| Cisco IMC Software Release | First Fixed Release |
|---|---|
| 1.4 | Not vulnerable |
| 1.5 | Not vulnerable |
| 2.0 | Not vulnerable |
| 3.0 | 3.0(4k) |
| 4.0 | 4.0(2f),4.0(4b) |
Customers can download Cisco IMC Software from the Software Center on Cisco.com by doing the following:
Cisco fixed this vulnerability in Cisco IMC Software Release 3.2(8) for Cisco UCS E-Series Servers.
Customers can download the software from the Software Center on Cisco.com by doing the following:
Cisco fixed this vulnerability in Cisco IMC Software Release 3.2(8) for Cisco 5000 Series Enterprise Network Compute System (ENCS) Platforms.
Customers can download the software from the Software Center on Cisco.com by doing the following:
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
This vulnerability was found during internal security testing.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
| Version | Description | Section | Status | Date |
|---|---|---|---|---|
| 1.0 | Initial public release. | - | Final | 2019-August-21 |
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