CVE-2019-1736
Cisco UCS C-Series Rack Servers UEFI Secure Boot Elevation of Privilege
Description
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.
INFO
Published Date :
Sept. 23, 2020, 1:15 a.m.
Last Modified :
Oct. 23, 2020, 6:21 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.7
Affected Products
The following products are affected by CVE-2019-1736
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-1736.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass | Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-1736 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-1736 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Oct. 23, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass Patch, Vendor Advisory Added CWE NIST CWE-347 Added CPE Configuration AND *cpe:2.3:o:cisco:fmc1000-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1f.0 *cpe:2.3:o:cisco:fmc1000-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration AND *cpe:2.3:o:cisco:fmc2500-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1f.0 *cpe:2.3:o:cisco:fmc2500-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration AND *cpe:2.3:o:cisco:fmc4500-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1f.0 *cpe:2.3:o:cisco:fmc4500-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration AND *cpe:2.3:o:cisco:sns-3515-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2d *cpe:2.3:o:cisco:sns-3515-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration AND *cpe:2.3:o:cisco:sns-3595-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2d *cpe:2.3:o:cisco:sns-3595-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration AND *cpe:2.3:o:cisco:sns-3615-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1i *cpe:2.3:o:cisco:sns-3615-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1g Added CPE Configuration AND *cpe:2.3:o:cisco:sns-3655-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1i *cpe:2.3:o:cisco:sns-3655-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1g Added CPE Configuration AND *cpe:2.3:o:cisco:sns-3695-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1i *cpe:2.3:o:cisco:sns-3695-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1g Added CPE Configuration AND *cpe:2.3:o:cisco:tg5004-k9_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2d *cpe:2.3:o:cisco:tg5004-k9_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration AND *cpe:2.3:o:cisco:tg5004-k9-rf_bios:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2d *cpe:2.3:o:cisco:tg5004-k9-rf_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.2h Added CPE Configuration OR *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:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-1736 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-1736
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.10264
percentile