SB2020021128 - Multiple vulnerabilities in Microsoft Remote Desktop Client

Description

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2020-0681)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of untrusted input within the Windows Remote Desktop Client when a user connects to a malicious server. A remote attacker can execute arbitrary code on the target system.

2) Input validation error (CVE-ID: CVE-2020-0734)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of untrusted input within the Windows Remote Desktop Client when a user connects to a malicious server. A remote attacker can execute arbitrary code on the target system.

3) Input validation error (CVE-ID: CVE-2020-0817)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of untrusted input within the Windows Remote Desktop Client when a user connects to a malicious server. A remote attacker can execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0681
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0734
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0817