Microsoft SharePoint Server Application Package input validation

Summaryinfo

A vulnerability was found in Microsoft SharePoint Server and classified as critical. Affected is an unknown function of the component Application Package Handler. Such manipulation leads to input validation. This vulnerability is listed as CVE-2019-0604. The attack may be performed from remote. In addition, an exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Microsoft SharePoint Server (Groupware Software). It has been rated as critical. Affected by this issue is an unknown code of the component Application Package Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability.

The weakness was presented 02/12/2019 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2019-0604. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.

A public exploit has been developed by Mohammed Aldoub (Voulnet) in Python and been published 2 years after the advisory. The exploit is available at exploit-db.com. It is declared as attacked. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110330 (Microsoft Office and Microsoft Office Services and Web Apps Security Update February 2019). This issue was added on 11/03/2021 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 05/03/2022:

Apply updates per vendor instructions.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (48053) and SecurityFocus (BID 106863†). See VDB-130777, VDB-130785, VDB-130821 and VDB-130822 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Microsoft SharePoint Server 2010 SP2
• Microsoft SharePoint Foundation 2013 SP1
• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Server 2019

Productinfo

Type

• Groupware Software

Vendor

• Microsoft

Name

• SharePoint Server

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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