CVE-2019-6811 Denial of service in Modicon Quantum 140 NOE771x1
A remote attacker can cause a denial of service on Schneider Modicon Quantum modules by sending oversized fragmented IP packets, requiring a power cycle to recover.
- 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-2019-6811?
CVE-2019-6811 is a high-severity denial of service vulnerability in Schneider Electric SE Modicon Quantum 140 NOE771x1, published on 17 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An Improper Check for Unusual or Exceptional Conditions (CWE-754) vulnerability exists in Modicon Quantum 140 NOE771x1 version 6.9 and earlier, which could cause denial of service when the module receives an IP fragmented packet with a length greater than 65535 bytes. The module then requires a power cycle to recover.
Weakness: CWE-754
Which versions are affected by CVE-2019-6811?
It affects 2 products.
Products include Schneider-Electric Modicon Quantum 140noe77101 Firmware, Schneider-Electric Modicon Quantum 140noe77111 Firmware.
How do I fix CVE-2019-6811?
No fix has been published for CVE-2019-6811 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-6811 being exploited?
There is no known exploitation of CVE-2019-6811 in the wild and no public exploit code.
Sources
Also known as GHSA-3xxj-wpwj-gxhm.