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.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.6, with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 22 products from cisco, from cisco, from cisco and 19 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2020-09-23T01:15:14.300
2024-11-21T04:37:12.767
Modified
CVSSv3.1: 6.6 (MEDIUM)
AV:L/AC:M/Au:N/C:C/I:C/A:C
3.4
10.0
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | fmc1000-k9_bios | < 4.0.1f.0 | Yes |
| Operating System | cisco | fmc1000-k9_firmware | < 4.0.2h | Yes |
| Operating System | cisco | fmc2500-k9_bios | < 4.0.1f.0 | Yes |
| Operating System | cisco | fmc2500-k9_firmware | < 4.0.2h | Yes |
| Operating System | cisco | fmc4500-k9_bios | < 4.0.1f.0 | Yes |
| Operating System | cisco | fmc4500-k9_firmware | < 4.0.2h | Yes |
| Operating System | cisco | sns-3515-k9_bios | < 4.0.2d | Yes |
| Operating System | cisco | sns-3515-k9_firmware | < 4.0.2h | Yes |
| Operating System | cisco | sns-3595-k9_bios | < 4.0.2d | Yes |
| Operating System | cisco | sns-3595-k9_firmware | < 4.0.2h | Yes |
| Operating System | cisco | sns-3615-k9_bios | < 4.0.1i | Yes |
| Operating System | cisco | sns-3615-k9_firmware | < 4.0.1g | Yes |
| Operating System | cisco | sns-3655-k9_bios | < 4.0.1i | Yes |
| Operating System | cisco | sns-3655-k9_firmware | < 4.0.1g | Yes |
| Operating System | cisco | sns-3695-k9_bios | < 4.0.1i | Yes |
| Operating System | cisco | sns-3695-k9_firmware | < 4.0.1g | Yes |
| Operating System | cisco | tg5004-k9_bios | < 4.0.2d | Yes |
| Operating System | cisco | tg5004-k9_firmware | < 4.0.2h | Yes |
| Operating System | cisco | tg5004-k9-rf_bios | < 4.0.2d | Yes |
| Operating System | cisco | tg5004-k9-rf_firmware | < 4.0.2h | Yes |
| Application | cisco | identity_services_engine | 2.4\(0.357\) | Yes |
| Application | cisco | identity_services_engine | 2.6\(0.156\) | Yes |
| Application | cisco | unified_computing_system | 3.2\(3h\)c | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.