SB2023071179 - Multiple vulnerabilities in Microsoft SharePoint Server

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2023-33134)

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

The vulnerability exists due to insufficient validation of user-supplied input in the Microsoft SharePoint Server. A remote user can pass specially crafted input to the application and execute arbitrary code on the target system.

2) Security features bypass (CVE-ID: CVE-2023-33165)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to security features bypass in Microsoft SharePoint Server. A remote user can download files without the access being logged.

3) Input validation error (CVE-ID: CVE-2023-33160)

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

The vulnerability exists due to insufficient validation of user-supplied input in thw Microsoft SharePoint Server. A remote user can pass specially crafted input to the application and execute arbitrary code on the target system.

4) Spoofing attack (CVE-ID: CVE-2023-33159)

The vulnerability allows a remote attacker to perform spoofing attack.

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

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-33134
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-33165
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-33160
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-33159