CVE-2018-8840 Memory corruption in Schneider Electric InduSoft Web Studio and InTouch Machine Edition

What is CVE-2018-8840?

CVE-2018-8840 is a critical memory corruption vulnerability in ICS-CERT Schneider Electric InduSoft Web Studio and InTouch Machine Edition, published on 18 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A remote attacker could send a carefully crafted packet in InduSoft Web Studio v8.1 and prior versions, and/or InTouch Machine Edition 2017 v8.1 and prior versions during a tag, alarm, or event related action such as read and write, which may allow remote code execution.

Weakness: CWE-119, CWE-121

Which versions are affected by CVE-2018-8840?

It affects 2 products.

Products include Indusoft Web Studio, Industrial-Software Intouch Machine Edition 2017.

How do I fix CVE-2018-8840?

No fix has been published for CVE-2018-8840 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-8840 being exploited?

There is no known exploitation of CVE-2018-8840 in the wild and no public exploit code.

Other vulnerabilities in ICS-CERT Schneider Electric InduSoft Web Studio and InTouch Machine Edition

• CVE-2014-0780 InduSoft Web Studio NTWebServer Directory Traversal Exploited High 7.5
• CVE-2011-4051 Auth bypass in n/a Critical 10.0
• CVE-2011-0342 Memory corruption in n/a Critical 10.0
• CVE-2011-1900 Path traversal in n/a Critical 10.0
• CVE-2011-4052 Memory corruption in n/a Critical 9.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-794x-w4ff-7p84.