Microsoft Office 365 ProPlus/2016 for Mac Word memory corruption

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Office 365 ProPlus/2016 for Mac. This affects an unknown part of the component Word. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2020-0851. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft Office 365 ProPlus/2016 for Mac (Office Suite Software) and classified as critical. Affected by this vulnerability is some unknown processing of the component Word. 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 Word software when it fails to properly handle objects in memory, aka 'Microsoft Word Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0850, CVE-2020-0852, CVE-2020-0855, CVE-2020-0892.

The weakness was disclosed 03/10/2020 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2020-0851. 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 Word software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user.

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

The entries VDB-151089, VDB-151088 and VDB-151086 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Office Suite Software

Vendor

• Microsoft

Name

• Office

Version

• 365 ProPlus
• 2016 for Mac

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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