CVE-2020-1523 : Security Advisory and Response

Microsoft SharePoint Server Tampering Vulnerability was published on 2020-09-11. An attacker could exploit this vulnerability to modify a targeted user's profile data on Microsoft SharePoint Server 2019 (version 16.0.0).

Understanding CVE-2020-1523

A tampering vulnerability in Microsoft SharePoint Server that allows attackers to manipulate profile data.

What is CVE-2020-1523?

The vulnerability arises from improper handling of profile data in Microsoft SharePoint Server.
Attackers can alter a user's profile data by sending a specially crafted request to the server.
An authenticated attacker on the affected SharePoint Server is required for exploitation.

The Impact of CVE-2020-1523

Successful exploitation could lead to unauthorized modification of user profile data.

Technical Details of CVE-2020-1523

This section covers detailed technical aspects of the vulnerability.

Vulnerability Description

Type: Tampering
Impact: Allows unauthorized modification of user profile data.

Affected Systems and Versions

Vendor: Microsoft
Product: Microsoft SharePoint Server 2019
Platforms: x64-based Systems
Version: 16.0.0 (status: affected)

Exploitation Mechanism

Attacker needs authentication on the affected SharePoint Server to send a tailored request targeting a specific user.

Mitigation and Prevention

Measures to address and prevent the vulnerability.

Immediate Steps to Take

Apply the security update provided by Microsoft to fix the vulnerability.
Ensure that all users update their SharePoint Server installations promptly.

Long-Term Security Practices

Regularly monitor user activities and profile data for unauthorized changes.
Educate users on identifying and reporting suspicious activities on the SharePoint Server.

Patching and Updates

Stay informed about security updates from Microsoft and apply them promptly to mitigate risk.