Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

Tenable 博客

订阅

Tenable Research Advisory: Critical Schneider Electric InduSoft Web Studio and InTouch Machine Edition Vulnerability

Tenable Research recently discovered a new remote code execution vulnerability in Schneider Electric’s InduSoft Web Studio and InTouch Machine Edition. The applications contain an overflow condition that is triggered when input is not properly validated. This allows an attacker to force a stack-based buffer overflow, resulting in denial of service or potentially allowing the execution of arbitrary code.

   

What do you need to know? Tenable Research has discovered a critical remote code execution vulnerability in Schneider Electric’s InduSoft Web Studio and InTouch Machine Edition.    

What's the attack vector? The vulnerability can be remotely exploited without authentication to execute arbitrary commands on the target system.    

What's the business impact? A malicious threat actor can completely compromise and gain control of the system, and use it as a pivot point to execute lateral transfer.    

What's the solution? Schneider Electric has released InduSoft Web Studio v8.1 SP1 and InTouch Machine Edition 2017 v8.1 SP1 to address this vulnerability. Affected users should apply the patches ASAP.

背景

InduSoft Web Studio is a suite of tools that provides automation building blocks to develop human-machine interfaces (HMIs), Supervisory Control And Data Acquisition (SCADA) systems and embedded instrumentation solutions.

InTouch Machine Edition is an HMI/SCADA software toolset to develop applications to connect automation systems such as Programmable Logic Controllers (PLCs) and to develop interfaces for web browsers, smartphones and tablets.

SCADA systems, comprising industrial-grade hardware and software, are a standard component of Industrial Control Systems (ICSs). They have traditionally been deployed around the world to monitor industrial infrastructure to collect, analyze and control information from sensors. With the growing adoption of distributed and remote monitoring in industrial environments, SCADA and operational technology (OT) are converging to provide true “beyond the perimeter” connectivity.

Diverse industries including agriculture, transportation, energy, nuclear power, manufacturing, entertainment and physical security use SCADA in conjunction with OT. Because of the critical and wide range of applications in modern infrastructure, SCADA systems have become a primary security concern and are increasingly being targeted by threat actors.

分析

Tenable Research found a new stack-based buffer overflow in InduSoft Web Studio and InTouch Machine Edition. A threat actor could send a crafted packet to exploit the buffer overflow vulnerability using a tag, alarm, event, read or write action to execute code.

IWS StackOverflow

The vulnerability can be remotely exploited without authentication and targets the IWS Runtime Data Server service, by default on TCP port 1234. The software implements a custom protocol that uses various “commands.” This vulnerability is triggered through command 50, and is caused by the incorrect usage of a string conversion function.

The vulnerability, when exploited, could allow an unauthenticated malicious entity to remotely execute code with high privileges.

The following is a proof of concept:

cat <(echo -ne '\x02\x57\x03\x02\x32'`python -c 'print "A"*0x500'`'\x09\x0a\x03') - | nc <target_host> 1234

IWS Crash

Business impact

An unauthenticated remote attacker can leverage this attack to execute arbitrary code on vulnerable systems, potentially leading to full compromise of the InduSoft Web Studio or InTouch Machine Edition server machine. A threat actor can use the compromised machine to laterally transfer within the victims network and to execute further attacks. Additionally, connected HMI clients and OT devices can be exposed to attack.

Given the widespread prevalence and market share of the affected software in the OT space, and the fact that it is frequently deployed in sensitive industries, Schneider and Tenable consider this a critical vulnerability requiring urgent attention and response from affected end users.

Vulnerability characterization and CVSSv3 rating

CWE-121: Stack-based Buffer Overflow

InduSoft Web Studio and ITME: 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

解决方案

Schneider Electric has released InduSoft Web Studio v8.1 SP1 and InTouch Machine Edition 2017 v8.1 SP1 to address this vulnerability. Update the application by applying the appropriate patches.

识别受影响的系统

Tenable released the following plugins to identify affected systems for the Schneider Electric InduSoft Web Studio/InTouch Machine Edition systems:

Additional information

To learn how you can safely discover, monitor and assess sensitive OT assets for vulnerabilities, join us on May 23 for the webinar, "Understand and Reduce Cyber Risk In Converged IT/OT Environments." Register now.

Special thanks to Steve Tilson, Josef Weiss and Jacob Baines for their contributions to this blog post.

相关文章

您是否易受最新漏洞利用的攻击?

输入您的电子邮件以在收件箱中接收最新的 Cyber Exposure 警报。

tenable.io

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。

Tenable.io Vulnerability Management 试用版还包括 Tenable Lumin、Tenable.io Web Application Scanning 和 Tenable.cs Cloud Security。

tenable.io 购买

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。 立即购买年度订阅。

65 项资产

选择您的订阅选项:

立即购买

免费试用 Nessus Professional

免费试用 7 天

Nessus® 是当今市场上功能最全面的漏洞扫描器。Nessus Professional 可帮助自动化漏洞扫描流程、节省合规周期的时间,并让您调动起 IT 团队的积极性。

购买 Nessus Professional

Nessus® 是当今市场上功能最全面的漏洞扫描器。Nessus Professional 可帮助自动化漏洞扫描流程、节省合规周期的时间,并让您调动起 IT 团队的积极性。

购买多年期许可,即享优惠价格添加高级支持功能,获取一年 365 天、一天 24 小时的电话、社区和聊天支持。

选择您的许可证

购买多年期许可,即享优惠价格

添加支持和培训

Tenable.io

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。

Tenable.io Vulnerability Management 试用版还包括 Tenable Lumin、Tenable.io Web Application Scanning 和 Tenable.cs Cloud Security。

Tenable.io 购买

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。 立即购买年度订阅。

65 项资产

选择您的订阅选项:

立即购买

试用 Tenable.io Web Application Scanning

完整享有专为现代化应用程序而设、属于 Tenable.io 平台组成部分的最新 Web 应用程序扫描功能。可安全扫描全部在线资产组合的漏洞,具有高度准确性,而且无需繁重的手动操作或中断关键的 Web 应用程序。 立即注册。

Tenable Web Application Scanning 试用版还包括 Tenable.io Vulnerability Management、Tenable Lumin 和 Tenable.cs Cloud Security。

购买 Tenable.io Web Application Scanning

可全面访问基于云的现代化漏洞管理平台,从而以无可比拟的精确度发现并追踪所有资产。 立即购买年度订阅。

5 个 FQDN

$3,578

立即购买

试用 Tenable.io Container Security

完整获得已集成至漏洞管理平台之唯一容器安全产品的功能。监控容器映像中的漏洞、恶意软件和策略违规。与持续集成和持续部署 (CI/CD) 系统进行整合,以支持 DevOps 实践、增强安全性并支持企业政策合规。

购买 Tenable.io Container Security

Tenable.io Container Security 经由与构建流程的集成,可供全面了解容器映像的安全性,包括漏洞、恶意软件和策略违规,借以无缝且安全地启用 DevOps 流程。

试用 Tenable Lumin

通过 Tenable Lumin 直观呈现及探索 Cyber Exposure,长期追踪风险降低状况,并比照同行业者进行基准度量。

Tenable Lumin 试用版还包括 Tenable.io Vulnerability Management、Tenable.io Web Application Scanning 和 Tenable.cs Cloud Security。

购买 Tenable Lumin

联系销售代表,了解 Lumin 如何帮助获取整个企业的洞见并管理网络安全风险。

试用 Tenable.cs

获取检测和修复云基础设施错误配置以及查看运行时漏洞的完全访问权限。立即注册,免费试用。

Tenable.cs Cloud Security 试用版还包括 Tenable.io Vulnerability Management、Tenable Lumin 和 Tenable.io Web Application Scanning。

联系销售代表购买 Tenable.cs

联系销售代表,了解有关 Tenable.cs 云安全的更多信息,并了解如何轻松加入您的云帐户,并在几分钟内获得云错误配置和漏洞的可见性。

免费试用 Nessus Expert

免费试用 7 天

Nessus Expert 针对现代攻击面而量身打造,可以查看更多信息,保护企业免遭从 IT 到云中漏洞的攻击。

已经有 Nessus Professional?
免费升级到 Nessus Expert 7 天。

购买 Nessus Expert

Nessus Expert 针对现代攻击面而量身打造,可以查看更多信息,保护企业免遭从 IT 到云中漏洞的攻击。

选择您的许可证

促销价格于 9 月 30 日结束。
购买多年许可证,节省幅度更大。

添加支持和培训