VulnerabilityModified

CVE-2020-5668

HIGH 7.5EPSS 4.93%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.93%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 4.93% probability · 92th percentile
CISA KEV: Not listed
Weakness: CWE-400
Affected: mitsubishielectric/r00cpu firmware · mitsubishielectric/r01cpu firmware · mitsubishielectric/r02cpu firmware · mitsubishielectric/r04cpu firmware · mitsubishielectric/r08cpu firmware · mitsubishielectric/r16cpu firmware · mitsubishielectric/r32cpu firmware · mitsubishielectric/r120cpu firmware · mitsubishielectric/r08sfcpu firmware · mitsubishielectric/r16sfcpu firmware · mitsubishielectric/r32sfcpu firmware · mitsubishielectric/r120sfcpu firmware · mitsubishielectric/r08pcpu firmware · mitsubishielectric/r16pcpu firmware · mitsubishielectric/r32pcpu firmware · mitsubishielectric/r120pcpu firmware · mitsubishielectric/r08psfcpu firmware · mitsubishielectric/r16psfcpu firmware · mitsubishielectric/r32psfcpu firmware · mitsubishielectric/r120psfcpu firmware · +8 more
Source: vultures@jpcert.or.jp

References

https://jvn.jp/vu/JVNVU95980140/index.htmlThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-324-05Third Party Advisory, US Government Resource
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdfVendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdfVendor Advisory
https://jvn.jp/vu/JVNVU95980140/index.htmlThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-324-05Third Party Advisory, US Government Resource
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdfVendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdfVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.