A vulnerability in the firmware of the Cisco UCS C-Series Rack Servers could allow an authenticated, physical attacker to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot validation checks and load a compromised software image on an affected device. The vulnerability is due to improper validation of the server firmware upgrade images. An attacker could exploit this vulnerability by installing a server firmware version that would allow the attacker to disable UEFI Secure Boot. A successful exploit could allow the attacker to bypass the signature validation checks that are done by UEFI Secure Boot technology and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco.
CVSS Details
- CVSS 3.1 Base Score: 6.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- CVSS 3.0 Base Score: 6.2
- CVSS 3.0 Vector: (CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Cisco Ucs_device | — | Upgrade to the latest version of Cisco UCS | Dec 8, 2020 | Sep 23, 2020 |
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