SB2024121087 - Multiple vulnerabilities in Microsoft SharePoint

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Improper access control (CVE-ID: CVE-2024-49068)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Microsoft SharePoint. A remote attacker can bypass implemented security restrictions and gain elevated privileges on the system.

2) Path traversal (CVE-ID: CVE-2024-49062)

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Microsoft SharePoint. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.

3) XML External Entity injection (CVE-ID: CVE-2024-49064)

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

The vulnerability exists due to insufficient validation of user-supplied XML input in Microsoft SharePoint. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

4) Deserialization of Untrusted Data (CVE-ID: CVE-2024-49070)

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

The vulnerability exists due to insecure input validation when processing serialized data in Microsoft SharePoint. A remote attacker can pass specially crafted data to the application 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-2024-49068
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-49062
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-49064
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-49070