CVE-2020-1103 : Security Advisory and Response
Learn about the information disclosure vulnerability in Microsoft SharePoint Server, impacting versions 2016, 2019, and 2013 Service Pack 1. Find out the risks, affected systems, and mitigation steps.
Microsoft SharePoint Information Disclosure Vulnerability affects multiple versions of Microsoft SharePoint software.
Understanding CVE-2020-1103
What is CVE-2020-1103?
An information disclosure vulnerability in Microsoft SharePoint Server allows for cross-site search attacks, potentially enabling unauthorized access to sensitive data.
The Impact of CVE-2020-1103
This vulnerability could be exploited by attackers to extract sensitive information from SharePoint, posing a risk to data confidentiality and integrity.
Technical Details of CVE-2020-1103
Vulnerability Description
Certain search function modes in Microsoft SharePoint Server are vulnerable to cross-site search attacks, a form of CSRF, enabling attackers to execute unauthorized search queries as logged-in users.
Affected Systems and Versions
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
- Microsoft SharePoint Foundation 2013 Service Pack 1
Exploitation Mechanism
When a user visits a malicious website while logged into SharePoint Server, the attacker can manipulate the browser to trigger search queries as the logged-in user.
Mitigation and Prevention
Immediate Steps to Take
- Apply the latest security updates provided by Microsoft promptly.
- Educate users on safe browsing practices and the risks of visiting unknown websites.
Long-Term Security Practices
- Regularly monitor and audit SharePoint access logs for unusual activities.
- Implement network segmentation to limit the impact of potential data breaches.
Patching and Updates
It is crucial to keep the SharePoint software up to date with the latest security patches and fixes to mitigate the information disclosure vulnerability.