CVE-2018-7758 Denial of service in MiCOM P540D Range with Legacy Ethernet Board
An attacker can cause loss of network communication in Schneider Electric MiCOM relays by exploiting TCP/IP session handling flaws on port 20000.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-7758?
CVE-2018-7758 is a medium-severity denial of service vulnerability in Schneider Electric SE MiCOM P540D Range with Legacy Ethernet Board, published on 18 Apr 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A denial of service vulnerability exists in Schneider Electric's MiCOM Px4x (P540 range excluded) with legacy Ethernet board, MiCOM P540D Range with Legacy Ethernet Board, and MiCOM Px4x Rejuvenated could lose network communication in case of TCP/IP open requests on port 20000 (DNP3oE) if an older TCI/IP session is still open with identical IP address and port number.
Weakness: CWE-613
Which versions are affected by CVE-2018-7758?
It affects 23 products.
Products include Schneider-Electric Micom P141 Firmware, Schneider-Electric Micom P142 Firmware, Schneider-Electric Micom P143 Firmware, Schneider-Electric Micom P145 Firmware, Schneider-Electric Micom P441 Firmware, Schneider-Electric Micom P442 Firmware and 17 more.
How do I fix CVE-2018-7758?
No fix has been published for CVE-2018-7758 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-2018-7758 being exploited?
There is no known exploitation of CVE-2018-7758 in the wild and no public exploit code.
Sources
Also known as GHSA-w8w3-m5jx-qwwr.