SB2023011819 - Predictable Seed in Pseudo-Random Number Generator in Mitsubishi Electric MELSEC iQ-F, iQ-R Series
Published: January 18, 2023 Updated: April 11, 2023
Security Bulletin ID
SB2023011819
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Predictable Seed in Pseudo-Random Number Generator (PRNG) (CVE-ID: CVE-2022-40267)
The vulnerability allows a remote attacker to compromise the system.
The vulnerability exists due to predictable seed in the pseudo-random number generator within the WEB server function. A remote attacker can bypass authorization on the target system.
This vulnerability affects the following products:
- MELSEC iQ-F Series with serial number 17X**** or later:
- FX5U-xMy/z x=32,64,80, y=T,R, z=ES,DS,ESS,DSS: Versions 1.280 and prior
- FX5UC-xMy/z x=32,64,96 y=T, z=D,DSS: Versions 1.280 and prior
- MELSEC iQ-F Series with serial number 179**** and prior:
- FX5U-xMy/z x=32,64,80, y=T,R, z=ES,DS,ESS,DSS: Versions 1.074 and prior
- FX5UC-xMy/z x=32,64,96 y=T, z=D,DSS: Versions 1.074 and prior
- MELSEC iQ-F Series FX5UC-32MT/DS-TS, FX5UC-32MT/DSS-TS, FX5UC-32MR/DS-TS: Versions 1.280 and prior
- MELSEC iQ-R Series R00/01/02CPU: All versions
- MELSEC iQ-R Series R04/08/16/32/ 120(EN)CPU: All versions
Remediation
Install update from vendor's website.