SecureCRT Memory Corruption Vulnerability (CVE-2020-12651) Threat Alert

SecureCRT Memory Corruption Vulnerability (CVE-2020-12651) Threat Alert

May 22, 2020 | Mina Hao

Overview

A memory corruption vulnerability (CVE-2020-12651) was fixed in the latest version 8.7.2 of SecureCRT. When the CSI function receives a large negative number as a parameter, it may allow the remote system to destroy the memory in the terminal process, resulting in the execution of arbitrary code or the program crashes.

An attacker may exploit this vulnerability in a manner similar to the SSH banner.

Reference link:

https://bugs.chromium.org/p/project-zero/issues/detail?id=2033

Affected Versions

  • SecureCRT Version < 8.7.2

Unaffected Versions

  • SecureCRT Version >= 8.7.2

Solution

The vulnerability has been fixed in the latest version. Users are advised to update their software to prevent the preceding risk.

In addition, for hosts that cannot be fully trusted, avoid using terminal emulation software to connect, and beware of malicious hosts using vulnerabilities in terminal emulation software to harm the host.

Update link:

https://www.vandyke.com/products/securecrt/history.txt

Download link:

https://www.vandyke.com/cgi-bin/releases.php?product=securecrt

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.