CVE-2020-7564 Memory corruption in Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details)
A buffer overflow in the Modicon PLC web server allows attackers to execute arbitrary commands by uploading a specially crafted file via FTP.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-7564?
CVE-2020-7564 is a medium-severity memory corruption vulnerability in Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details), published on 18 Nov 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details) which could cause write access and the execution of commands when uploading a specially crafted file on the controller over FTP.
Weakness: CWE-120
Which versions are affected by CVE-2020-7564?
It affects 20 products.
Products include Schneider-Electric Modicon M340 Bmx Noc 0401 Firmware, Schneider-Electric Modicon M340 Bmx Noe 0100 Firmware, Schneider-Electric Modicon M340 Bmx Noe 0100h Firmware, Schneider-Electric Modicon M340 Bmx Noe 0110 Firmware, Schneider-Electric Modicon M340 Bmx Noe 0110h Firmware, Schneider-Electric Modicon M340 Bmx nor 0200h Firmware and 14 more.
How do I fix CVE-2020-7564?
No fix has been published for CVE-2020-7564 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-2020-7564 being exploited?
There is no known exploitation of CVE-2020-7564 in the wild and no public exploit code.
Other vulnerabilities in Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details)
- CVE-2020-7562 Memory corruption in Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details)
- CVE-2020-7563 Memory corruption in Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details)
- CVE-2013-2763 Denial of service in n/a
Sources
Also known as GHSA-m8xw-66cv-rfr6.