CVE-2019-1736
CVSS V2 Medium 6.9
CVSS V3 Medium 6.6
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.
Overview
- CVE ID
- CVE-2019-1736
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2020-09-23T01:15:14
- Last Modified Date
- 2020-10-23T18:21:19
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:cisco:fmc1000-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1f.0 | |
| cpe:2.3:o:cisco:fmc1000-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:o:cisco:fmc2500-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1f.0 | |
| cpe:2.3:o:cisco:fmc2500-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:o:cisco:fmc4500-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1f.0 | |
| cpe:2.3:o:cisco:fmc4500-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:o:cisco:sns-3515-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2d | |
| cpe:2.3:o:cisco:sns-3515-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:o:cisco:sns-3595-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2d | |
| cpe:2.3:o:cisco:sns-3595-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:o:cisco:sns-3615-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1i | |
| cpe:2.3:o:cisco:sns-3615-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1g | |
| cpe:2.3:o:cisco:sns-3655-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1i | |
| cpe:2.3:o:cisco:sns-3655-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1g | |
| cpe:2.3:o:cisco:sns-3695-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1i | |
| cpe:2.3:o:cisco:sns-3695-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.1g | |
| cpe:2.3:o:cisco:tg5004-k9_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2d | |
| cpe:2.3:o:cisco:tg5004-k9_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:o:cisco:tg5004-k9-rf_bios:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2d | |
| cpe:2.3:o:cisco:tg5004-k9-rf_firmware:*:*:*:*:*:*:*:* | 1 | AND | 4.0.2h | |
| cpe:2.3:a:cisco:identity_services_engine:2.4\(0.357\):*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:identity_services_engine:2.6\(0.156\):*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:unified_computing_system:3.2\(3h\)c:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 6.9
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 6.6
- Base Severity
- MEDIUM
- Exploitability Score
- 0.7
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass | Patch Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-1736 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1736 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:22:13 | Added to TrackCVE | |||
| 2022-12-04 23:10:48 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-04 23:10:48 | 2020-09-23T01:15Z | 2020-09-23T01:15:14 | CVE Published Date | updated |
| 2022-12-04 23:10:48 | 2020-10-23T18:21:19 | CVE Modified Date | updated | |
| 2022-12-04 23:10:48 | Analyzed | Vulnerability Status | updated |