CVE-2020-5668 Denial of service in MELSEC iQ-R
Remote unauthenticated attackers can cause denial of service in Mitsubishi MELSEC iQ-R modules by sending specially crafted SLMP 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-2020-5668?
CVE-2020-5668 is a high-severity denial of service vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R, published on 20 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules (R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, R08/16/32/120SFCPU firmware version '22' and earlier, R08/16/32/120PCPU firmware version '25' and earlier, R08/16/32/120PSFCPU firmware version '06' and earlier, RJ71EN71 firmware version '47' and earlier, RJ71GF11-T2 firmware version '47' and earlier, RJ72GF15-T2 firmware version '07' and earlier, RJ71GP21-SX firmware version '47' and earlier, RJ71GP21S-SX firmware version '47' and earlier, and RJ71GN11-T2 firmware version '11' and earlier) allows a remote unauthenticated attacker to cause an error in a CPU unit and cause a denial-of-service (DoS) condition in execution of the program and its communication, or to cause a denial-of-service (DoS) condition in communication via the unit by receiving a specially crafted SLMP packet
Weakness: CWE-400
Which versions are affected by CVE-2020-5668?
It affects 28 products.
Products include Mitsubishielectric R00cpu Firmware, Mitsubishielectric R01cpu Firmware, Mitsubishielectric R02cpu Firmware, Mitsubishielectric R04cpu Firmware, Mitsubishielectric R08cpu Firmware, Mitsubishielectric R08pcpu Firmware and 22 more.
How do I fix CVE-2020-5668?
No fix has been published for CVE-2020-5668 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-2020-5668 being exploited?
There is no known exploitation of CVE-2020-5668 in the wild and no public exploit code.
Other vulnerabilities in Mitsubishi Electric Corporation MELSEC iQ-R
Sources
Also known as GHSA-9rm6-q34g-q949.