National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-3968 Detail

Current Description

An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.

Source:  MITRE
Description Last Modified:  03/21/2019
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.0 HIGH
Vector: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 1.0


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

CVSS v2.0 Severity and Metrics:

Base Score: 4.4 MEDIUM
Vector: (AV:L/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 3.4


Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633 Exploit Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Improper Verification of Cryptographic Signature (CWE-347)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
2013.07
Up to (including)
2014.07
 cpe:2.3:a:denx:u-boot:2013.07:rc1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:denx:u-boot:2013.07:rc2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:denx:u-boot:2013.07:rc3:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:denx:u-boot:2014.07:rc1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:denx:u-boot:2014.07:rc2:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-3968
NVD Published Date:
03/21/2019
NVD Last Modified:
04/02/2019