Microsoft Excel up to 2016 memory corruption

Summaryinfo

A vulnerability was found in Microsoft Excel 365 Apps for Enterprise/2010 SP2/2013 RT SP1/2013 SP1/2016. It has been classified as critical. Impacted is an unknown function. This manipulation causes memory corruption. This vulnerability appears as CVE-2020-0901. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability has been found in Microsoft Excel 365 Apps for Enterprise/2010 SP2/2013 RT SP1/2013 SP1/2016 (Spreadsheet Software) and classified as critical. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.

The weakness was presented 05/12/2020 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2020-0901. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

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

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Productinfo

Type

• Spreadsheet Software

Vendor

• Microsoft

Name

• Excel

Version

• 365 Apps for Enterprise
• 2010 SP2
• 2013 RT SP1
• 2013 SP1
• 2016

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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