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
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| R00cpu_firmware | Mitsubishielectric | * | 19 (including) |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.