SB2021091416 - Multiple vulnerabilities in Microsoft SharePoint Server

Description

This security bulletin contains information about 2 vulnerabilities.

1) Spoofing attack (CVE-ID: CVE-2021-38652)

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:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear

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.

2) Spoofing attack (CVE-ID: CVE-2021-38651)

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:N/SC:L/SI:L/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-2021-38652
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38651