CVE-2019-1443 : Security Advisory and Response
Learn about CVE-2019-1443, an information disclosure vulnerability in Microsoft SharePoint allowing attackers to access sensitive data by uploading malicious files. Find mitigation steps and preventive measures here.
Microsoft SharePoint vulnerability allows information disclosure when a malicious file is uploaded, potentially enabling attackers to obtain SMB hashes.
Understanding CVE-2019-1443
What is CVE-2019-1443?
An information disclosure vulnerability in Microsoft SharePoint allows attackers to access sensitive information by uploading a specially crafted file to the SharePoint Server.
The Impact of CVE-2019-1443
This vulnerability could be exploited by authenticated attackers to leverage SharePoint features and acquire SMB hashes, compromising data confidentiality.
Technical Details of CVE-2019-1443
Vulnerability Description
The security flaw in Microsoft SharePoint involves improper file content verification, enabling attackers to disclose information.
Affected Systems and Versions
- Microsoft SharePoint Foundation 2010 Service Pack 2
- Microsoft SharePoint Foundation 2013 Service Pack 1
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
Exploitation Mechanism
Attackers upload a specially designed file to the SharePoint Server, taking advantage of the vulnerability to access SMB hashes.
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by Microsoft to address the vulnerability.
- Monitor SharePoint Server for any unauthorized file uploads.
Long-Term Security Practices
- Regularly update and patch SharePoint servers to prevent vulnerabilities.
- Implement access controls and user permissions to restrict file uploads.
- Conduct security training to educate users on safe file handling practices.
Patching and Updates
Ensure timely installation of security patches and updates for Microsoft SharePoint to mitigate the risk of information disclosure.