CVE-2019-1736
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.
- Score
- CVSS 3.1 6.6 Medium
- Status
- Modified - psirt@cisco.com
- Published
- 2020-09-23
- Last modified
- 2024-11-13
- Weaknesses
- CWE-347
Affected products
- Cisco Identity Services Engine Software (Cisco)
- Fmc1000-k9 Bios (Cisco)
- Fmc1000-k9 Firmware (Cisco)
- Fmc2500-k9 Bios (Cisco)
- Fmc2500-k9 Firmware (Cisco)
- Fmc4500-k9 Bios (Cisco)
- Fmc4500-k9 Firmware (Cisco)
- Identity Services Engine (Cisco)
- Sns-3515-k9 Bios (Cisco)
- Sns-3515-k9 Firmware (Cisco)
- Sns-3595-k9 Bios (Cisco)
- Sns-3595-k9 Firmware (Cisco)
- Sns-3615-k9 Bios (Cisco)
- Sns-3615-k9 Firmware (Cisco)
- Sns-3655-k9 Bios (Cisco)
- Sns-3655-k9 Firmware (Cisco)
- Sns-3695-k9 Bios (Cisco)
- Sns-3695-k9 Firmware (Cisco)
- Tg5004-k9-rf Bios (Cisco)
- Tg5004-k9-rf Firmware (Cisco)
- Tg5004-k9 Bios (Cisco)
- Tg5004-k9 Firmware (Cisco)
- Unified Computing System (Cisco)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass
