Microsoft Excel up to 2016 input validation

Summaryinfo

A vulnerability was found in Microsoft Excel 365 ProPlus/2010 SP2/2013 RT SP1/2013 SP1/2016. It has been rated as critical. Impacted is an unknown function. Performing a manipulation results in input validation. This vulnerability is identified as CVE-2019-1111. The attack can be initiated remotely. There is not any exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft Excel 365 ProPlus/2010 SP2/2013 RT SP1/2013 SP1/2016 (Spreadsheet Software). It has been classified as critical. This affects an unknown function. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on 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'. This CVE ID is unique from CVE-2019-1110.

The weakness was released 07/09/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2019-1111 since 11/26/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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.

Entries connected to this vulnerability are available at VDB-137572 and VDB-137570. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Spreadsheet Software

Vendor

• Microsoft

Name

• Excel

Version

• 365 ProPlus
• 2010 SP2
• 2013 RT SP1
• 2013 SP1
• 2016

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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