SB2022011185 - Multiple vulnerabilities in Microsoft Windows Remote Desktop Client

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2022-21850)

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

The vulnerability exists due to a boundary error in the Remote Desktop Client. A remote attacker can trick the victim to connect to a malicious RDP server, trigger memory corruption and execute arbitrary code on the target system.

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

2) Buffer overflow (CVE-ID: CVE-2022-21851)

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

The vulnerability exists due to a boundary error when processing PDU (Server RDP Preconnection) requests in client's drive redirection virtual channel in Remote Desktop Client. A remote attacker can trick the victim to connect to a malicious RDP server, 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-2022-21850
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21851