Vulnerability Details : 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.
Products affected by CVE-2019-1736
- cpe:2.3:a:cisco:unified_computing_system:3.2\(3h\)c:*:*:*:*:*:*:*
- 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: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:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-1736
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-1736
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.9
|
MEDIUM | AV:L/AC:M/Au:N/C:C/I:C/A:C |
3.4
|
10.0
|
NIST | |
|
6.2
|
MEDIUM | CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
0.3
|
5.9
|
Cisco Systems, Inc. | |
|
6.6
|
MEDIUM | CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
0.7
|
5.9
|
NIST |
CWE ids for CVE-2019-1736
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)
References for CVE-2019-1736
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass
Multiple Cisco UCS-Based Products UEFI Secure Boot Bypass VulnerabilityPatch;Vendor Advisory
Jump to