CVE-2020-16952 : Vulnerability Insights and Analysis
Learn about CVE-2020-16952, a remote code execution vulnerability in Microsoft SharePoint allowing attackers to run arbitrary code. Find out affected systems, exploitation details, and mitigation steps.
A remote code execution vulnerability in Microsoft SharePoint allows attackers to run arbitrary code in the context of the SharePoint application pool and server farm account.
Understanding CVE-2020-16952
What is CVE-2020-16952?
A remote code execution vulnerability exists in Microsoft SharePoint due to a failure in checking the source markup of an application package.
The Impact of CVE-2020-16952
Exploiting this vulnerability requires uploading a specially crafted SharePoint application package, potentially leading to arbitrary code execution.
Technical Details of CVE-2020-16952
Vulnerability Description
The vulnerability arises from the software's failure to properly validate the source markup of application packages.
Affected Systems and Versions
- Microsoft SharePoint Enterprise Server 2016 (Version 16.0.0)
- Microsoft SharePoint Server 2019 (Version 16.0.0)
- Microsoft SharePoint Foundation 2013 Service Pack 1 (Version 15.0.0)
Exploitation Mechanism
To exploit, a user must upload a malicious SharePoint application package to an affected SharePoint version.
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by Microsoft to address the vulnerability.
- Ensure users do not upload suspicious or untrusted SharePoint application packages.
Long-Term Security Practices
- Regularly update and patch SharePoint servers to prevent vulnerabilities.
- Implement strict upload policies for SharePoint application packages.
- Conduct security training to educate users on safe practices.
Patching and Updates
Microsoft has released a security update to correct how SharePoint validates the source markup of application packages.