CVE-2020-5655 Null dereference in MELSEC iQ-R series
Remote unauthenticated attackers can cause denial of service in Mitsubishi MELSEC iQ-R network modules via crafted packets triggering null dereference.
- 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-2020-5655?
CVE-2020-5655 is a high-severity vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R series, published on 30 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
NULL pointer dereferences vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products via a specially crafted packet.
Weakness: CWE-476
Which versions are affected by CVE-2020-5655?
It affects 5 products.
Products include Mitsubishielectric Melsec Iq-Rd81dl96 Firmware, Mitsubishielectric Melsec Iq-Rd81mes96n Firmware, Mitsubishielectric Melsec Iq-Rd81opc96 Firmware, Mitsubishielectric Melsec Iq-Rj71eip91 Firmware, Mitsubishielectric Melsec Iq-Rj71pn92 Firmware.
How do I fix CVE-2020-5655?
No fix has been published for CVE-2020-5655 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-5655 being exploited?
There is no known exploitation of CVE-2020-5655 in the wild and no public exploit code.
Other vulnerabilities in Mitsubishi Electric Corporation MELSEC iQ-R series
Sources
Also known as GHSA-2qq5-4hp7-fpfq.