SB2020021165 - Multiple vulnerabilities in Microsoft Windows

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2020-0698)

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

The vulnerability exists due to a boundary condition within the Telephony Service. A local user can use a specially crafted application to trigger out-of-bounds read error and read contents of memory on the system.

2) Buffer overflow (CVE-ID: CVE-2020-0818)

The vulnerability allows a local user to escalate privilege so the system.

The vulnerability exists due to a boundary error in the sysmain.dll when handling objects in memory. A local user can create a specially crafted application, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0698
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0818