CVE-2020-5547 Denial of service in Mitsubishi Electric MELQIC IU1 series

Critical 9.8 Published 16 Mar 2020 Updated 4 Aug 2024

Remote attackers can disrupt network functions or execute malware on Mitsubishi Electric MELQIC IU1 series devices 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-2020-5547?

CVE-2020-5547 is a critical denial of service 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

Resource Management Errors vulnerability in TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier allows remote attackers to stop the network functions or execute malware via a specially crafted packet.

Which versions are affected by CVE-2020-5547?

It affects 1 product.

Products include Mitsubishielectric Iu1-1m20-D Firmware.

How do I fix CVE-2020-5547?

No fix has been published for CVE-2020-5547 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-2020-5547 being exploited?

There is no known exploitation of CVE-2020-5547 in the wild and no public exploit code.

Sources

Also known as GHSA-g3wh-5wcr-5qp6.