Vulnerability · Published Jan 20, 2023 · Assigned by Mitsubishi
CVE-2022-40267Authentication Bypass Vulnerability in Web Server Function on MELSEC Series
Medium 5.9
In plain English
A medium-severity security flaw in MELSEC iQ-F Seres FX5U-80MT/ES from Mitsubishi Electric Corporation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).
Official description
Predictable Seed in Pseudo-Random Number Generator (PRNG) vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-xMy/z (x=32,64,80, y=T,R, z=ES,DS,ESS,DSS) with serial number 17X**** or later, and versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-xMy/z (x=32,64,80, y=T,R, z=ES,DS,ESS,DSS) with serial number 179**** and prior, and versions 1.074 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-xMy/z (x=32,64,96, y=T, z=D,DSS)) with serial number 17X**** or later, and versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-xMy/z (x=32,64,96, y=T, z=D,DSS)) with serial number 179**** and prior, and versions 1.074 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-xMy/z (x=24,40,60, y=T,R, z=ES,ESS) versions 1.042 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-xMy/ES-A (x=24,40,60, y=T,R) versions 1.043 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-xMy/z (x=30,40,60,80, y=T,R, z=ES,ESS) versions 1.003 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU versions 33 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU versions 66 and prior allows a remote unauthenticated attacker to access the Web server function by guessing the random numbers used for authentication from several used random numbers.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-32MT/ES | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-64MT/ES | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Seres FX5U-80MT/ES | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-32MR/ES | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-64MR/ES | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-80MR/ES | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-32MT/DS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-64MT/DS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-80MT/DS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-32MR/DS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-64MR/DS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-80MR/DS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-32MT/ESS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-64MT/ESS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-80MT/ESS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-32MT/DSS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-64MT/DSS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5U-80MT/DSS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-32MT/D | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-64MT/D | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-96MT/D | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-32MT/DSS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-64MT/DSS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-96MT/DSS | serial number 17X**** or later, and versions 1.280 and priorserial number 179**** and prior, and versions 1.074 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-32MT/DS-TS | versions 1.280 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-32MT/DSS-TS | versions 1.280 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5UC-32MR/DS-TS | versions 1.280 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-R Series R00CPU | versions 33 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-R Series R01CPU | versions 33 and prior |
| Mitsubishi Electric Corporation | MELSEC iQ-R Series R02CPU | versions 33 and prior |
Weakness: CWE-337 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N