On April 24, 2018, researchers disclosed a vulnerability that takes advantage of a buffer overflow vulnerability in NVIDIA TX1 BootROM when Recovery Mode (RCM) is active. This vulnerability could allow an unprivileged, local attacker to bypass secure boot and execute unverified code on an affected system. The vulnerability has been identified by CVE-2018-6242. To exploit this vulnerability, an attacker must be able to physically access the device along with the affected processor’s USB connection. This vulnerability cannot be exploited remotely, even if the device is connected to the Internet. Cisco has identified all products that use the NVIDIA TX1 processor and has released software updates to address this vulnerability. The software update will permanently disable the ability to activate RCM. Should customers attempt to downgrade their software version, the ability to activate RCM will no longer be available. 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-20180620-nvidia-tx1-rom
On April 24, 2018, researchers disclosed a vulnerability that takes advantage of a buffer overflow vulnerability in NVIDIA TX1 BootROM when Recovery Mode (RCM) is active. This vulnerability could allow an unprivileged, local attacker to bypass secure boot and execute unverified code on an affected system.
The vulnerability has been identified by CVE-2018-6242.
To exploit this vulnerability, an attacker must be able to physically access the device along with the affected processor’s USB connection. This vulnerability cannot be exploited remotely, even if the device is connected to the Internet.
Cisco has identified all products that use the NVIDIA TX1 processor and has released software updates to address this vulnerability. The software update will permanently disable the ability to activate RCM. Should customers attempt to downgrade their software version, the ability to activate RCM will no longer be available.
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-20180620-nvidia-tx1-rom
Cisco has investigated its product line to determine which products may be affected by this vulnerability.
Any product not listed in the Vulnerable Products section of this advisory is to be considered not vulnerable.
The following table lists Cisco products that are affected by the vulnerability described in this advisory:
Product Cisco Bug ID Fixed Release Availability Collaboration Endpoints Cisco WebEx Room 55 CSCvj27020 CE9.2.6 (Available)
CE9.3.2 (Available)Cisco WebEx Room 70 Single/Dual CSCvj27020 CE9.2.6 (Available)
CE9.3.2 (Available)Cisco WebEx Room Kit CSCvj27020 CE9.2.6 (Available)
CE9.3.2 (Available)Cisco WebEx Room Kit Plus CSCvj27020 CE9.2.6 (Available)
CE9.3.2 (Available)Cloud-Based Deployments RoomOS CSCvj27020 RoomOS 2018-06-01 608dcdbb6e1
Note: Collaboration Endpoints are installed on-premises for customer deployments. RoomOS is an alternate software offering for the same products, but via cloud-based deployments (e.g., Cisco WebEx cloud subscriptions). Cisco controls the push of the software to these units, which have either already received the patch via software updates, or will receive the update the next time the device is powered on and online.
There are no workarounds that address this vulnerability.
For information about fixed software releases, see the Vulnerable Products section of this advisory
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.
The vulnerability described in this advisory was discussed in several articles and discussion forums as of April 24, 2018.
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any malicious use of the vulnerability that is described in this advisory.
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 | 2018-June-20 |
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