CVE-2020-5668: Vulnerability Analysis & Exploit Details

CVE-2020-5668 Vulnerability Summary

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

CVE-2020-5668: Detailed Information and External References

EPSS

0.01610

EPSS %

0.87284

References

0.01610

• https://jvn.jp/vu/JVNVU95980140/index.html
• https://us-cert.cisa.gov/ics/advisories/icsa-20-324-05
• https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdf
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdf

CWE

CWE-400

CAPEC

0.01610

• XML Ping of the Death: An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
• Sustained Client Engagement: An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.
• Regular Expression Exponential Blowup: An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.

Vulnerable Configurations

• cpe:2.3:o:mitsubishielectric:r00cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r00cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r00cpu_firmware:19:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r00cpu_firmware:19:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r00cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r00cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r01cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r01cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r01cpu_firmware:19:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r01cpu_firmware:19:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r01cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r01cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r02cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r02cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r02cpu_firmware:19:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r02cpu_firmware:19:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r02cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r02cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r04cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r04cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r04cpu_firmware:51:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r04cpu_firmware:51:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r04cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r04cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r08cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r08cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r08cpu_firmware:51:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r08cpu_firmware:51:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r08cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r08cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r16cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r16cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r16cpu_firmware:51:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r16cpu_firmware:51:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r16cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r16cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r32cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r32cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r32cpu_firmware:51:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r32cpu_firmware:51:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r32cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r32cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r120cpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r120cpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r120cpu_firmware:51:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r120cpu_firmware:51:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r120cpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r120cpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:22:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:22:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r08sfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r08sfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:22:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:22:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r16sfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r16sfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:22:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:22:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r32sfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r32sfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:22:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:22:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r120sfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r120sfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r08pcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r08pcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r08pcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r08pcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r16pcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r16pcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r16pcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r16pcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r32pcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r32pcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r32pcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r32pcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r120pcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r120pcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r120pcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r120pcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r08psfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r08psfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r08psfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r08psfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r16psfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r16psfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r16psfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r16psfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r32psfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r32psfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r32psfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r32psfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:r120psfcpu_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:r120psfcpu_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:r120psfcpu:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:r120psfcpu:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71en71_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71en71_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71en71_firmware:47:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71en71_firmware:47:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71en71:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71en71:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gf11-t2_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gf11-t2_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gf11-t2_firmware:47:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gf11-t2_firmware:47:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71gf11-t2:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71gf11-t2:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj72gf15-t2_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj72gf15-t2_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj72gf15-t2_firmware:07:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj72gf15-t2_firmware:07:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj72gf15-t2:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj72gf15-t2:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gp21-sx_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gp21-sx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gp21-sx_firmware:47:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gp21-sx_firmware:47:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71gp21-sx:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71gp21-sx:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gp21s-sx_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gp21s-sx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gp21s-sx_firmware:47:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gp21s-sx_firmware:47:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71gp21s-sx:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71gp21s-sx:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71c24-r2_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71c24-r2_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71c24-r2:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71c24-r2:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71c24-r4_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71c24-r4_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71c24-r4:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71c24-r4:-:*:*:*:*:*:*:*
• cpe:2.3:o:mitsubishielectric:rj71gn11-t2_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:o:mitsubishielectric:rj71gn11-t2_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishielectric:rj71gn11-t2:-:*:*:*:*:*:*:*
  cpe:2.3:h:mitsubishielectric:rj71gn11-t2:-:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H