CVE-2022-33324

Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU Firmware versions 32 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions 65 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R08/16/32/120SFCPU Firmware versions 29 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R12CCPU-V Firmware versions 17 and prior, Mitsubishi Electric Corporation MELSEC iQ-L Series L04/08/16/32HCPU all versions and Mitsubishi Electric Corporation MELIPC Series MI5122-VW all versions allows a remote unauthenticated attacker to cause a Denial of Service condition in Ethernet communication on the module by sending specially crafted packets. A system reset of the module is required for recovery.

Weakness

The product does not release or incorrectly releases a resource before it is made available for re-use.

Affected Software

Potential Mitigations

• Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
• For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/125.html
• https://cwe.mitre.org/data/definitions/130.html
• https://cwe.mitre.org/data/definitions/131.html
• https://cwe.mitre.org/data/definitions/494.html
• https://cwe.mitre.org/data/definitions/495.html
• https://cwe.mitre.org/data/definitions/496.html
• https://cwe.mitre.org/data/definitions/666.html

References

• https://jvn.jp/vu/JVNVU96883262
• https://www.cisa.gov/uscert/ics/advisories/icsa-22-356-03
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-018_en.pdf