CVE-2020-5543 Other in Mitsubishi Electric MELQIC IU1 series

Critical 9.8 Published 16 Mar 2020 Updated 4 Aug 2024

Remote attackers can execute malware or disrupt network functions in Mitsubishi Electric MELQIC IU1 series PLCs via crafted packets.

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-2020-5543?

CVE-2020-5543 is a critical vulnerability in Mitsubishi Electric MELQIC IU1 series, published on 16 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier does not properly manage sessions, which allows remote attackers to stop the network functions or execute malware via a specially crafted packet.

Weakness: CWE-384

Which versions are affected by CVE-2020-5543?

It affects 1 product.

Products include Mitsubishielectric Iu1-1m20-D Firmware.

How do I fix CVE-2020-5543?

No fix has been published for CVE-2020-5543 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-5543 being exploited?

There is no known exploitation of CVE-2020-5543 in the wild and no public exploit code.

Sources

Also known as GHSA-q999-969v-8wx8.