Microsoft SharePoint Server 2010 SP2/2013 SP1/2016/2019 Markup Application Package code download

Summaryinfo

A vulnerability classified as critical has been found in Microsoft SharePoint Server 2010 SP2/2013 SP1/2016/2019. This vulnerability affects unknown code of the component Markup Handler. Performing a manipulation as part of Application Package results in code download. This vulnerability is known as CVE-2020-1200. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft SharePoint Server 2010 SP2/2013 SP1/2016/2019 (Groupware Software). It has been classified as critical. This affects some unknown processing of the component Markup Handler. The manipulation as part of a Application Package leads to a code download vulnerability. CWE is classifying the issue as CWE-494. The product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

<p>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.</p> <p>Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.</p> <p>The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.</p>

The weakness was published 09/08/2020 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release has been coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2020-1200. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1495 for this issue. 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.

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

Similar entry is available at VDB-160846. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Groupware Software

Vendor

• Microsoft

Name

• SharePoint Server

Version

• 2010 SP2
• 2013 SP1
• 2016
• 2019

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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