SB2021081033 - Multiple vulnerabilities in Microsoft Azure Sphere

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2021-26430)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the Azure Sphere. A local administrator can pass specially crafted input to the application and perform a denial of service (DoS) attack.

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-26429)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in the Azure Sphere, which leads to security restrictions bypass and privilege escalation.

3) Information disclosure (CVE-ID: CVE-2021-26428)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the Azure Sphere. A local administrator can gain unauthorized access to sensitive information on the system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26430
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26429
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26428