SB2022011125 - Multiple vulnerabilities in Microsoft Exchange Server

Description

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2022-21855)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote user to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote user on the local network can send specially crafted data to the Exchange server and execute arbitrary code on the system.

2) Input validation error (CVE-ID: CVE-2022-21969)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote user to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote user on the local network can send specially crafted data to the Exchange server and execute arbitrary code on the system.

3) Input validation error (CVE-ID: CVE-2022-21846)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote user to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote user on the local network can send specially crafted data to the Exchange server and execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21855
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21969
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21846