SB2020111031 - Multiple vulnerabilities in Microsoft Windows Network File System

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2020-17047)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Windows Network File System. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

2) Code Injection (CVE-ID: CVE-2020-17051)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in Windows Network File System. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

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

3) Information disclosure (CVE-ID: CVE-2020-17056)

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 Windows Network File System. A local user 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-2020-17047
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17051
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17056