CVE-2017-6034 Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay
Attackers can bypass authentication by replaying cleartext Modbus commands to control PLC operations like run, stop, upload, and download.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6034?
CVE-2017-6034 is a critical authentication bypass vulnerability in Schneider Electric Modicon Modbus Protocol, published on 30 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.
Which versions are affected by CVE-2017-6034?
It affects 1 product.
Products include Schneider-Electric Modbus Firmware.
How do I fix CVE-2017-6034?
No fix has been published for CVE-2017-6034 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-6034 being exploited?
There is no known exploitation of CVE-2017-6034 in the wild and no public exploit code.
Other vulnerabilities in Schneider Electric Modicon Modbus Protocol
Sources
Also known as GHSA-m8hv-35c9-8jrx.