CVE Vulnerability

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.

6.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

6.6 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.7 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass Patch Vendor Advisory
Configurations

Configuration 1

cpe:2.3:o:cisco:fmc1000-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:fmc1000-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:fmc2500-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:fmc2500-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:fmc4500-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:fmc4500-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3515-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3515-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3595-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3595-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3615-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3615-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3655-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3655-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3695-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sns-3695-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:tg5004-k9_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:tg5004-k9_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:tg5004-k9-rf_bios:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:tg5004-k9-rf_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:2.4(0.357):*:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:2.6(0.156):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_computing_system:3.2(3h)c:*:*:*:*:*:*:*
Information

Published : 2020-09-23 01:15

Updated : 2020-10-23 06:21

NVD link : CVE-2019-1736

Mitre link : CVE-2019-1736

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature