SB2020031043 - Multiple vulnerabilities in Microsoft Connected User Experiences and Telemetry Service

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2020-0863)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

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

The vulnerability exists due to the Windows Connected User Experiences and Telemetry Service improperly discloses file information. A local user can use a specially crafted application and gain unauthorized access to sensitive information on the system.

2) Buffer overflow (CVE-ID: CVE-2020-0844)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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 escalate privileges on the system.

The vulnerability exists due to a boundary error when Connected User Experiences and Telemetry Service improperly handles file operations. A local user can use a specially crafted application to trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0863
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0844