Microsoft Exchange Remote Code Execution Vulnerability (CVE-2020-17144) Threat Alert

Microsoft Exchange Remote Code Execution Vulnerability (CVE-2020-17144) Threat Alert

January 6, 2021 | Mina Hao

Overview

Microsoft disclosed a remote code execution vulnerability (CVE-2020-17144) Microsoft Exchange Server 2010 in its latest December security updates, rating the vulnerability as Important.  

The vulnerability exists because the program improperly verifies cmdlet parameters. An authenticated attacker could exploit this vulnerability to cause remote code execution.

This vulnerability is similar to CVE-2020-0688 and requires login before being exploited. However, to exploit it does not require a plaintext password but NTHash. In addition to regular mail services and OWA, the EWS interface also provides the necessary methods for exploitation. The functions of the vulnerability are also persistent.

At present, detailed analysis and exploitation of this vulnerability have appeared. Affected users are advised to take measures to avert risks without delay.

Reference links:

https://www.secrss.com/articles/27709
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2020-17144

Affected Version

  • Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 31

Solution

Microsoft has fixed the preceding vulnerability in the monthly security updates released this time. Users should download the updates for protection as soon as possible.

For more information, see Microsoft’s official security advisory at the following link:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2020-17144

Statement

This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.

About NSFOCUS

NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.

NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA).

A wholly owned subsidiary of NSFOCUS Technologies Group Co., Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.