High severity · published Nov 20, 2020
CVE-2020-5668
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…
7.5
CVSS
4.9%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.9% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RF
R00cpu Firmware · Mitsubishielectric
through 19 · source: NVD
RF
R01cpu Firmware · Mitsubishielectric
through 19 · source: NVD
RF
R02cpu Firmware · Mitsubishielectric
through 19 · source: NVD
RF
R04cpu Firmware · Mitsubishielectric
through 51 · source: NVD
RF
R08cpu Firmware · Mitsubishielectric
through 51 · source: NVD
RF
R08pcpu Firmware · Mitsubishielectric
through 25 · source: NVD
RF
R08psfcpu Firmware · Mitsubishielectric
through 06 · source: NVD
RF
R08sfcpu Firmware · Mitsubishielectric
through 22 · source: NVD
RF
R120cpu Firmware · Mitsubishielectric
through 51 · source: NVD
RF
R120pcpu Firmware · Mitsubishielectric
through 25 · source: NVD
RF
R120psfcpu Firmware · Mitsubishielectric
through 06 · source: NVD
RF
R120sfcpu Firmware · Mitsubishielectric
through 22 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5668
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5668
Third Party Advisory
https://jvn.jp/vu/JVNVU95980140/index.html
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-324-05
Vendor Advisory
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdf
Vendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdf
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