Resource exhaustion in Mitsubishielectric Melsec Iq-R00cpu
CVE-2020-5652
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
Vulnerability class: DoS (Denial of Service)
EPSS: 0.036 (88.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mitsubishielectric Melsec_iq-r00cpu
- Mitsubishielectric Melsec_iq-r00cpu_firmware — versions 20
- Mitsubishielectric Melsec_iq-r01cpu
- Mitsubishielectric Melsec_iq-r01cpu_firmware — versions 20
- Mitsubishielectric Melsec_iq-r02cpu
- Mitsubishielectric Melsec_iq-r02cpu_firmware — versions 20
- Mitsubishielectric Melsec_iq-r04encpu
- Mitsubishielectric Melsec_iq-r04encpu_firmware — versions 52
- Mitsubishielectric Melsec_iq-r08encpu
- Mitsubishielectric Melsec_iq-r08encpu_firmware — versions 52
Weakness classification (CWE)
References
- vultures@jpcert.or.jp (x_refsource_MISC, Vendor Advisory)
- vultures@jpcert.or.jp (x_refsource_MISC, Vendor Advisory)
- vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-5652?
- CVE-2020-5652 is a high-severity vulnerability in Mitsubishielectric Melsec Iq-R00cpu, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-11-02.
- How severe is CVE-2020-5652?
- High severity. CVSS v3 base score is 7.5 out of 10.