SB2020101352 - Multiple vulnerabilities in Microsoft Windows Remote Desktop Protocol (RDP)

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2020-16896)

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

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

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Remote Desktop Protocol (RDP). A remote attacker can run a specially crafted application against a server which provides RDP services and gain unauthorized access to sensitive information on the system.

2) Input validation error (CVE-ID: CVE-2020-16927)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/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 a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Remote Desktop Protocol (RDP) . A remote attacker can run a specially crafted application against a server which provides RDP services and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16896
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16927