High severity · published Dec 17, 2021
CVE-2021-20608
Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior allows a remote unauthenticated attacker to cause a…
7.5
CVSS
2.9%
EPSS
No
On KEV
Description
Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior allows a remote unauthenticated attacker to cause a DoS condition in GX Works2 by getting GX Works2 to read a tampered program file from a Mitsubishi Electric PLC by sending malicious crafted packets to tamper with the program file.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GW
GX Works2 · Mitsubishielectric
through 1.606g · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20608
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20608
Third Party Advisory
https://jvn.jp/vu/JVNVU93019896/index.html
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04
Vendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-020_en.pdf
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