SB2021062505 - Multiple vulnerabilities in Dell BIOSConnect and HTTPS Boot features

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Main Vulnerability Database SB2021062505

SB2021062505 - Multiple vulnerabilities in Dell BIOSConnect and HTTPS Boot features

Published: June 25, 2021

Security Bulletin ID SB2021062505
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 25% Low 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Improper certificate validation (CVE-ID: CVE-2021-21571)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper certificate validation within the Dell BIOSConnect and Dell HTTPS Boot features. A remote attacker can perform MitM attack and cause a denial of service or tamper with the system boot.


2) Buffer overflow (CVE-ID: CVE-2021-21572)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise the affected system.

The vulnerability exists due to a boundary error within Dell BIOSConnect feature. A local user with privileged access to the system can bypass UEFI restrictions and execute arbitrary code.


3) Buffer overflow (CVE-ID: CVE-2021-21573)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise the affected system.

The vulnerability exists due to a boundary error within Dell BIOSConnect feature. A local user with privileged access to the system can bypass UEFI restrictions and execute arbitrary code.


4) Buffer overflow (CVE-ID: CVE-2021-21574)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise the affected system.

The vulnerability exists due to a boundary error within Dell BIOSConnect feature. A local user with privileged access to the system can bypass UEFI restrictions and execute arbitrary code.


Remediation

Install update from vendor's website.

References