SB2022020838 - Multiple vulnerabilities in Microsoft SharePoint Server

Description

This security bulletin contains information about 3 vulnerabilities.

1) Deserialization of Untrusted Data (CVE-ID: CVE-2022-22005)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

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

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

The vulnerability exists due to insecure input validation when processing serialized data stored in client-side templates. A remote user can send specially crafted data to the application and execute arbitrary code on the target system in the context of the SharePoint web server process..

2) Security features bypass (CVE-ID: CVE-2022-21968)

CWE-ID: CWE-254 - Security Features

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

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

The vulnerability exists due to an error in Microsoft SharePoint Server. A remote authenticated attacker can gain access to sensitive information.

3) Spoofing attack (CVE-ID: CVE-2022-21987)

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

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

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Microsoft SharePoint Server. A remote authenticated attacker can spoof page content.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-22005
• https://www.zerodayinitiative.com/advisories/ZDI-22-352/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21968
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21987