Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2017-3775

Severity CVSS v4.0:
Pending analysis
Type:
CWE-287 Authentication Issues
Publication date:
04/05/2018
Last modified:
13/06/2018

Description

Some Lenovo System x server BIOS/UEFI versions, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it. As a result, an attacker with physical access to the system could boot unsigned code.

Impact

Vector 3.x
CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Physical
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
6.40
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:M/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.90 MEDIUM
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
6.90
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:lenovo:flex_system_x240_m5_bios:*:*:*:*:*:*:*:* 2.61 (excluding)
cpe:2.3:h:lenovo:flex_system_x240_m5:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_system_x280_x6_bios:*:*:*:*:*:*:*:* 4.21 (excluding)
cpe:2.3:h:lenovo:flex_system_x280_x6:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_system_x480_x6_bios:*:*:*:*:*:*:*:* 4.21 (excluding)
cpe:2.3:h:lenovo:flex_system_x480_x6:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:flex_system_x880_bios:*:*:*:*:*:*:*:* 4.21 (excluding)
cpe:2.3:h:lenovo:flex_system_x880:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:nextscale_nx360_m5_bios:*:*:*:*:*:*:*:* 2.61 (excluding)
cpe:2.3:h:lenovo:nextscale_nx360_m5:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:system_x3250_m6_bios:*:*:*:*:*:*:*:* 2.23 (excluding)
cpe:2.3:h:lenovo:system_x3250_m6:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:system_x3500_m5_bios:*:*:*:*:*:*:*:* 2.61 (excluding)
cpe:2.3:h:lenovo:system_x3500_m5:-:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:system_x3550_m5_bios:*:*:*:*:*:*:*:* 2.61 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools