VulnerabilityModified

CVE-2020-5653

CRITICAL 9.8EPSS 3.21%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Buffer overflow vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 3.21% probability · 87th percentile
CISA KEV: Not listed
Weakness: CWE-120
Affected: mitsubishielectric/melsec iq-rj71eip91 firmware · mitsubishielectric/melsec iq-rj71pn92 firmware · mitsubishielectric/melsec iq-rd81dl96 firmware · mitsubishielectric/melsec iq-rd81mes96n firmware · mitsubishielectric/melsec iq-rd81opc96 firmware
Source: vultures@jpcert.or.jp

References

https://jvn.jp/vu/JVNVU92513419/index.htmlThird Party Advisory
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdfVendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-012_en.pdfVendor Advisory
https://jvn.jp/vu/JVNVU92513419/index.htmlThird Party Advisory
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdfVendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-012_en.pdfVendor Advisory

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